Hello, fellow food enthusiasts and outdoor adventurers! There’s nothing quite like enjoying a perfectly chilled drink or a fresh meal when you’re out exploring, whether it’s a bustling farmers market, a serene hiking trail, or a lively beach picnic. The right gear can truly transform these experiences, keeping your culinary delights at their peak.
I’m Mohammad Maruf — the founder and writer behind KitchPrep. With over 15 years immersed in culinary equipment, my expertise comes from analyzing thousands of user reviews, comparing specs, and studying market trends for portable food and drink solutions.
My mission is to cut through the noise and present you with the absolute best options, ensuring your portable provisions stay fresh and delightful, no matter where your day takes you. For culinary adventurers and outdoor enthusiasts seeking reliable portable refreshment, our guide unveils the best backpack with cooler compartment to keep your provisions perfectly chilled on any journey.
How To Choose The Best Backpack With Cooler Compartment
Choosing the ideal backpack with a cooler compartment means balancing capacity, insulation, durability, and comfort for your specific needs. Here’s what to consider to make an informed decision.
Capacity & Compartments
Consider how much you typically need to carry. Are you packing lunch for a single person, drinks for a small group, or a full day’s worth of snacks for the family? Look at the advertised can capacity, but also consider the actual liters or quarts to get a better sense of usable space. Dual compartments are fantastic for separating dry goods from chilled items, preventing soggy sandwiches and keeping your gear organized.
Insulation & Leak-Proofing
The core function of a cooler backpack is to keep things cold. Look for high-performance insulation like closed-cell foam or radiant barriers that reflect heat. Pay close attention to claims about ice retention (e.g., “keeps cold for 24 hours” or “ice for 2 days”). Equally important is a leak-proof liner, especially if you plan to use loose ice. Welded seams and high-quality zippers are key indicators of effective leak protection.
Durability & Comfort
Your cooler backpack will likely face various elements, so durable materials like ballistic nylon, heavy-duty polyester, or vinyl are crucial. Look for reinforced stitching, robust zippers, and water-resistant or waterproof exteriors. For comfort, padded shoulder straps, a padded back panel with mesh for breathability, and adjustable sternum or waist straps can make a huge difference, especially when the pack is fully loaded.
Quick Comparison
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| Model | Type | Best For | Key Feature | Amazon |
|---|---|---|---|---|
| Titan Deep Freeze Ice Wall Backpack Cooler | Backpack Cooler | Overall Value | 2-Day Ice Retention | AmazonCheck Price |
| RTIC 24 Can Ultra-Tough Backpack Cooler | Soft Cooler | Rugged Adventures | Floating & Leakproof | AmazonCheck Price |
| YETI Hopper M Series Backpack Soft Sided Coolers | Soft Cooler | Premium Performance | MagShield Access | AmazonCheck Price |
| CamelBak ChillBak Pack 30 | Hydration Cooler | Long Hikes | Integrated 6L Reservoir | AmazonCheck Price |
| Engel BP25 25 Quart Roll-Top High Performance Cooler | Roll-Top Cooler | Extreme Cold Retention | Vacuum Valve Technology | AmazonCheck Price |
| SPARTER Backpack Cooler Insulated Leak Proof | Dual Compartment | Large Capacity | 49 Can Storage | AmazonCheck Price |
| Corkcicle EOLA Cooler Backpack | Stylish Carry | Wine & Picnics | Vegan Leather Design | AmazonCheck Price |
| Stanley All Day Madeleine Backpack Soft Cooler | Eco-Friendly Cooler | Versatile Travel | Recycled Polyester | AmazonCheck Price |
| Columbia PFG Thermal Pack Cooler | Thermal Efficiency | Hot Weather Days | Therma-Flect Barrier | AmazonCheck Price |
| Carhartt Mens Insulated 24 Can Two Compartment Cooler | Work & Utility | Job Site Lunch | Heavy-Duty Polyester | AmazonCheck Price |
| Baitium Fishing Backpack, Tackle Bag With Rod Holders | Angler’s Essential | Fishing Trips | Rod Holders & Tackle Trays | AmazonCheck Price |
| Hydro Flask Cooler Backpack – 20 L Capacity | Everyday Chill | Quick Outings | 24-Hour Cold | AmazonCheck Price |
| Igloo Backpack Coolers | Insulated Soft Sided Cooler Bag | Compact & Portable | Beach Day | MaxCold Insulation | AmazonCheck Price |
| Wolverine 36 Can Cooler Backpack | Budget Durable | Heavy-Duty Use | Ballistic-Style Weave | AmazonCheck Price |
| JanSport Cool Backpack with 15-inch Laptop Sleeve | School & Work | Daily Commute | Laptop Sleeve | AmazonCheck Price |
In‑Depth Reviews
1. Titan Deep Freeze Ice Wall Backpack Cooler
Check Latest PriceThe Titan Deep Freeze Ice Wall Backpack Cooler stands out as our top pick for its exceptional blend of performance, practical features, and value. Designed to keep ice for up to two days, it’s built with Deep Freeze Performance Insulation and a radiant heat barrier, making it a reliable companion for extended outings.
Owners consistently praise its ability to keep contents ice cold for extended periods, even in scorching southern heat, often noting that the included Ice Wall ice packs remain frozen all day. Many appreciate the multiple insulated compartments and external pockets for organizing snacks, phones, and sunscreen, while the Microban protection in the lining ensures cleanliness and prevents odors. Its comfortable, padded backpack straps with a sternum strap make it easy to carry, even when fully loaded.
This backpack cooler is perfect for anyone needing serious cold retention without the bulk of a hard cooler. Whether you’re heading to the beach, a soccer game, or a long day at the job site, its durable, water-repellent exterior and thoughtful design ensure your provisions stay perfectly chilled and accessible.
Why it’s great
- Exceptional 2-day ice retention with included ice packs
- Microban protection prevents odors and stains
- Multiple compartments and pockets for superior organization
- Comfortable to carry with padded, adjustable straps
Good to know
- Zipper is not fully leak-proof if tipped over with loose ice
- Optimal performance with additional ice packs on very hot days
2. RTIC 24 Can Ultra-Tough Backpack Cooler
Check Latest PriceFor those who demand uncompromising toughness and superior cold retention, the RTIC 24 Can Ultra-Tough Backpack Cooler is an excellent choice. Its welded seam construction and waterproof zipper mean it’s not just leak-resistant, but truly floats, making it ideal for boating or waterside excursions.
Outdoor enthusiasts consistently highlight its incredible durability and effective insulation, reporting ice retention for up to two days. The innovative Cold Lock Press Lid allows for quick access to drinks without fully unzipping, a feature particularly appreciated when on the beach or boat. Many reviewers found it perfectly comfortable to carry, even when fully loaded, thanks to its padded shoulder straps and extra back support.
This RTIC cooler is engineered for serious adventurers who need their provisions to stay cold and dry in the most challenging conditions. It’s a reliable investment for fishing trips, camping, or any activity where durability and leak-proof performance are paramount.
Why it’s great
- Ultra-tough, floating design with waterproof zipper
- Up to 2 inches of closed-cell foam insulation for 2-day ice retention
- Cold Lock Press Lid for easy, quick access
- Comfortable hands-free carrying with padded straps
Good to know
- Zipper can be stiff initially; recommend zipper lubricant
- Heavy when fully loaded with ice and beverages
3. YETI Hopper M Series Backpack Soft Sided Coolers
Check Latest PriceThe YETI Hopper M Series Backpack Soft Sided Cooler represents the pinnacle of portable cooling, offering premium construction and innovative features for the discerning user. Its standout MagShield Access uses powerful magnets for an ultra leak-resistant shield that stays open for easy loading and snaps shut securely.
Merchandisers and travelers alike rave about its impressive cold-holding capabilities, consistently reporting drinks stay ice-cold for hours, even during long shifts or hot weather. The DryHide Shell ensures puncture and UV resistance, promising longevity, while the comfortable backpack design frees up your hands for other gear. Many appreciate the convenience of the MagShield opening, though some note it can be stiff to fully close with the buckles.
If you’re seeking a top-tier soft cooler that delivers on durability, cold retention, and ease of access, the YETI Hopper M Series is a fantastic investment. It’s perfect for daily work, tailgating, boating, or any activity where reliable, hands-free cold storage is a must-have.
Why it’s great
- MagShield Access for ultra leak-resistant and easy opening
- ColdCell Insulation provides impressive cold-holding
- DryHide Shell withstands punctures and UV rays
- Comfortable backpack design for hands-free transport
Good to know
- Higher price point than many competitors
- Opening can be stiff for larger items or to buckle closed
4. CamelBak ChillBak Pack 30 Soft Cooler Backpack
Check Latest PriceThe CamelBak ChillBak Pack 30 is a unique offering that combines robust cooling with an integrated hydration system, making itan exceptional choice for long hikes, camping, and tailgating. It includes a 6L Fusion Group Reservoir with a TRU Zip waterproof zipper, conveniently stowed behind the back panel, providing easy access to water via an exterior spigot.
Users who’ve taken this pack to lakes, rivers, and baseball games appreciate its large capacity, which holds 24 cans and 15 lbs of ice, and its ability to keep contents cold for up to 72 hours. The roll-top closure allows for single-hand access while enhancing thermal efficiency. While some note its considerable size, many find it surprisingly comfortable to wear, even when fully loaded, making it a favorite for family outings.
This backpack is ideal for those who prioritize both cold storage and hands-free hydration. If your adventures demand extended cold retention and a reliable water source, the CamelBak ChillBak Pack 30 delivers a comprehensive solution for your outdoor culinary needs.
Why it’s great
- Integrated 6L hydration reservoir with exterior spigot
- Exceptional 72-hour cold retention for ice and contents
- Large capacity for 24 cans plus 15 lbs of ice
- Roll-top closure for easy access and superior thermal efficiency
Good to know
- Can be quite heavy when fully loaded
- Some users find the bag to be very large and bulky
5. Engel BP25 25 Quart Roll-Top High Performance Backpack Cooler
Check Latest PriceThe Engel BP25 Roll-Top High Performance Backpack Cooler is designed for those who need serious cold-holding power in a portable format. Featuring 1 inch of closed-cell foam insulation and a unique vacuum valve technology, it promises exceptional cooling performance for extended periods, even in challenging environments.
Construction workers and boaters praise its durability and impressive ice retention, with some reporting ice slush remaining after an extended weekend in brutal South Louisiana heat. The wide mouth roll-top design allows for easy access and a watertight seal, while padded shoulder straps and a chest strap ensure comfort during rugged treks. While some find the roll-top closure a bit cumbersome compared to a zipper, its effectiveness in insulation is highly valued.
This Engel cooler is built for demanding use where keeping contents ice-cold is non-negotiable. Whether you’re on a construction site, a multi-day boat trip, or a challenging hike, its robust construction and advanced insulation make it a reliable partner for keeping your provisions perfectly chilled.
Why it’s great
- 1-inch closed-cell foam insulation for high performance
- Unique vacuum valve technology for enhanced cooling
- Wide mouth roll-top design ensures watertight seal and easy access
- Durable materials and comfortable padded straps with chest strap
Good to know
- Roll-top closure can be less convenient than a zipper for some
- Some users report less than advertised ice retention in extreme heat without vacuum feature
6. SPARTER Backpack Cooler Insulated Leak Proof
Check Latest PriceThe SPARTER Backpack Cooler is a surprisingly robust option, offering an impressive 49-can capacity and dual insulated compartments, making it a versatile choice for larger groups or longer outings. Its thickened 8mm foam insulation and advanced silver PEVA seal are designed to keep beverages cool for up to 20 hours.
Families and festival-goers consistently praise its generous storage, noting it holds a ton of snacks, drinks, and even medical supplies, keeping everything cold all day in the heat. The high-tech seamless hot pressing process ensures a leak-proof liner, providing peace of mind. Many find it comfortable to wear, even when full, thanks to the chest and waist buckles that distribute weight and lessen shoulder stress.
This SPARTER cooler is ideal for anyone needing substantial cold storage with thoughtful organization. Whether you’re packing for a family picnic, a music festival, or a long day of outdoor activities, its ample capacity and effective insulation make it a highly recommended choice.
Why it’s great
- Massive 49-can capacity with dual insulated compartments
- 20-hour cold retention with thickened foam and PEVA seal
- Leak-proof liner with high-tech seamless hot pressing process
- Comfortable to wear with chest and waist buckles
Good to know
- Zipper is not leak-proof; be careful not to tip over
- Padding on straps felt cheap to one user, though functional
7. Corkcicle EOLA Cooler Backpack
Check Latest PriceThe Corkcicle EOLA Cooler Backpack combines exceptional cooling performance with a sleek, stylish design, making it a standout choice for those who value aesthetics as much as functionality. Crafted with vegan leather, it’s perfect for poolside hangs, hikes, and weekend picnics with its leakproof construction and all-day chill.
Picnic planners and beach-goers adore its elegant appearance and impressive ability to keep beverages icy cold for long periods, even in intense heat. It comfortably fits 12 cans or 5 wine bottles, and its padded adjustable backpack straps and soft body support ensure comfortable carrying. Many users highlight its leak-proof design, even when ice melts, making it a reliable companion for any outing.
If you’re looking for a cooler backpack that makes a statement while keeping your drinks perfectly chilled, the Corkcicle EOLA is an excellent choice. It’s ideal for social events, day trips, or as a thoughtful gift for friends who appreciate both style and substance.
Why it’s great
- Sleek and stylish vegan leather design
- Leakproof construction for all-day chill
- Fits 12 cans or 5 wine bottles comfortably
- Padded, adjustable straps and soft body support for comfort
Good to know
- Capacity is more geared towards beverages than large meals
- Premium price point for its stylish aesthetic
8. Stanley All Day Madeleine Backpack Soft Cooler
Check Latest PriceThe Stanley All Day Madeleine Backpack Soft Cooler is a thoughtfully designed option that prioritizes sustainability without compromising on performance. Crafted from recycled polyester, it offers an environmentally conscious way to keep up to 20 cans chilled for a full day, making it a versatile companion for various outings.
Travelers and picnic planners appreciate its dual functionality, noting it can be used to pack clothes as a carry-on and then converted into a cooler at the destination. The unique top opening, which pops open for easy loading and unloading, is frequently praised. Users also love its comfortable backpack design, making it easy to carry heavy freezer items or drinks to sports events and social gatherings.
This Stanley cooler is an excellent choice for eco-conscious individuals who need a reliable and adaptable cooler for hiking, picnics, social events, or travel. Its durable construction and lifetime warranty further solidify its appeal as a long-term investment.
Why it’s great
- Made from recycled polyester, an eco-conscious choice
- Versatile functionality: carry-on for clothes, then cooler for drinks
- Convenient organization with discreet zipper and stretch-mesh pockets
- Lifetime warranty from a trusted brand
Good to know
- Some users express wariness about zipper longevity over time
- Initial chemical smell that requires airing out
9. Columbia PFG Thermal Pack Cooler
Check Latest PriceThe Columbia PFG Thermal Pack Cooler is engineered for superior thermal efficiency, featuring ThermaCool high-performance insulation with a Therma-Flect radiant barrier that actively reflects heat. This design makes it an excellent choice for keeping contents cold even on the hottest days.
Ballpark parents and beach-goers consistently commend its ability to keep ice for several hours in 90+ degree weather, even with frequent opening. The Ultra Safe, leak-proof lining with Microban protection ensures hygiene and easy cleaning, while multiple exterior pockets and elasticized gear straps provide ample storage for essentials. Many appreciate the padded back with breathable mesh and adjustable straps for comfortable carrying, even when fully packed.
This backpack cooler is perfect for anyone needing reliable cold storage during outdoor activities where heat is a major factor. From hiking to beach trips, it ensures your food and drinks stay fresh and cool, making your day more enjoyable.
Why it’s great
- Therma-Flect radiant barrier for superior heat reflection
- Ultra Safe, leak-proof lining with Microban protection
- Multiple exterior pockets and gear straps for organization
- Comfortable padded back and adjustable straps
Good to know
- Zipper is not waterproof; can leak if bent over with melted ice
- More suited for ice packs than loose ice to prevent potential leaks
10. Carhartt Mens Insulated 24 Can Two Compartment Cooler Backpack
Check Latest PriceThe Carhartt Mens Insulated 24 Can Two Compartment Cooler Backpack is a rugged and practical choice, especially for those in blue-collar professions or anyone needing a durable bag for daily use. Crafted from 1200-Denier heavy-duty polyester, it’s designed to withstand tough environments while keeping food and drinks cool.
Construction workers and mail carriers consistently praise its durability and ample storage, noting it holds everything from tools and work essentials to a full lunch and beverages. The dual compartment design effectively separates cold food from dry gear. While some mention the cooler compartment isn’t stellar for all-day cold retention in extreme heat, it performs well for several hours with an ice pack, and its ability to take a beating is a common highlight.
This Carhartt backpack is an ideal solution for individuals who need a reliable, hard-wearing bag that combines a traditional backpack with a functional cooler. It’s perfect for job sites, long work days, or anyone who values robust construction and practical organization.
Why it’s great
- Heavy-duty 1200-Denier polyester for extreme durability
- Dual compartments for separating cold food and dry gear
- Contoured shoulder straps for comfortable carrying
- Robust zippers that hold up to heavy use
Good to know
- Cooler insulation is not top-tier for all-day extreme cold retention
- Bottom cooler compartment is not sturdy, requires containers for soft items
11. Baitium Fishing Backpack, Tackle Bag With Rod Holders
Check Latest PriceThe Baitium Fishing Backpack is meticulously designed for serious anglers, offering a comprehensive solution for carrying gear, bait, and refreshments. With a 40L capacity, intelligently placed rod holders, and an insulated top pocket, it redefines convenience on fishing expeditions.
Fishermen and outdoor enthusiasts consistently praise its robust 600D Oxford material, which ensures long-term performance and withstands harsh conditions. The inclusion of four 3600 size tackle boxes and a purpose-built rain cover adds immense value, preparing you for any angling scenario. Many appreciate the insulated pocket for keeping bait fresh or drinks cold, and its comfortable carry for accessing hard-to-reach fishing spots.
This Baitium backpack is an indispensable tool for passionate anglers, providing unmatched durability, organization, and all-weather assurance. It’s not just a gear bag; it’s a statement of preparedness and a commitment to eco-conscious design, with a portion of sales supporting ocean and wildlife conservation.
Why it’s great
- Dedicated rod holders and four 3600 size tackle boxes included
- Insulated top pocket for bait or drinks
- Constructed from durable 600D Oxford material
- Includes a rain cover for all-weather protection
Good to know
- Some users desire more internal organization beyond tackle boxes
- Zippers feel a bit flimsy to a few reviewers
12. Hydro Flask Cooler Backpack – 20 L Capacity
Check Latest PriceThe Hydro Flask Cooler Backpack is a lightweight yet mighty option, designed to keep your contents cold for up to 24 hours. Its 20L capacity and large, hinge-top opening make it incredibly easy to load, access, and clean, perfect for those on-the-go moments.
Disney-goers and travelers praise its ability to keep drinks cool all day in intense Florida heat, and its leakproof lining ensures a mess-free experience. Made with 100% recycled polyester fabric, it’s also a choice you can feel good about. Many users find it comfortable to wear as a backpack, making hands-free transport a breeze, and appreciate that it holds its shape even when empty.
This Hydro Flask cooler is an excellent choice for anyone seeking a reliable, portable cooler for daily use, quick trips, or travel. Its combination of effective insulation, durable recycled materials, and user-friendly design makes it a solid investment for keeping your refreshments perfectly chilled.
Why it’s great
- Keeps contents cold for up to 24 hours
- Leakproof lining that easily wipes down
- Made from 100% recycled polyester fabric
- Padded, stowable shoulder straps for easy carrying
Good to know
- Some users wish it was slightly wider for more diverse item sizes
- Can be heavy when fully packed with drinks and ice
13. Igloo Backpack Coolers | Insulated Soft Sided Cooler Bag
Check Latest PriceThe Igloo Backpack Cooler offers a compact and comfortable way to carry your chilled provisions, making it ideal for beach days, short hikes, or picnics. Its MaxCold insulation is designed to keep drinks and food cold for a full day, providing reliable performance in a lightweight package.
Beach-goers and casual hikers frequently commend its ability to keep items cool even in hot, humid weather, especially when paired with reusable ice packs. The spacious internal compartment holds up to 30 cans, and an outer front slip pocket provides convenient storage for smaller essentials. Many users appreciate the comfortable, cushioned straps and the chest strap, making it easy to carry even when full.
This Igloo cooler is a great value for anyone seeking a dependable, easy-to-carry soft-sided cooler for everyday outings. It strikes a good balance between capacity and portability, ensuring your snacks and beverages stay cool without being cumbersome.
Why it’s great
- MaxCold insulation keeps contents cold for a full day
- Comfortable adjustable shoulder straps with chest strap
- Spacious main compartment holds up to 30 cans
- Lightweight and easy to carry for various activities
Good to know
- May leak some water if actual ice cubes melt without double bagging
- Some users wish for more internal space for diverse items
14. Wolverine 36 Can Cooler Backpack
Check Latest PriceThe Wolverine 36 Can Cooler Backpack is a testament to durability and practical design, offering a heavy-duty solution for keeping your provisions cold. Constructed with 100% Nylon High-density Ballistic-style weave and a DWR coating, it’s built to withstand the rigors of daily use and outdoor adventures.
Job site workers and campers frequently highlight its robust construction, particularly the large, durable zippers that resist failure, unlike many competitors. The dual compartment design—a dedicated ice-compatible cooler at the base and a dry storage top—is highly valued for organization. Users report cold drinks staying cold for at least 16 hours, making it a reliable choice for long days.
This Wolverine backpack is an excellent option for anyone needing a tough, reliable, and well-organized cooler backpack that offers great value for its price point. It’s perfect for work, day hiking, or any scenario where durability and effective cold storage are essential.
Why it’s great
- Heavy-duty ballistic-style nylon with DWR coating for durability
- Dual compartments for organized wet and dry storage
- Large, robust zippers that resist breaking
- Keeps cold drinks cold for at least 16 hours
Good to know
- May leak if tipped over with melting ice, as with many soft coolers
- Does not stand up on its own when empty or lightly loaded
15. JanSport Cool Backpack with 15-inch Laptop Sleeve
Check Latest PriceThe JanSport Cool Backpack is a versatile and stylish option, primarily designed for students and professionals, but with a thoughtful addition of an insulated front pocket. This makes it a fantastic choice for daily commutes, school, or work where you need to carry both electronics and chilled snacks.
Students and offshore cooks alike praise its spacious compartments, including a dedicated padded 15-inch laptop sleeve, and its overall durability. The ergonomic S-curve shoulder straps and padded back panel ensure comfort even with heavy loads. Many users specifically highlight the insulated front pocket as a “thoughtful touch” for keeping drinks or snacks cool, making it surprisingly functional for food storage alongside traditional backpack duties.
This JanSport backpack is perfect for anyone seeking a reliable, organized, and comfortable bag that can seamlessly transition from academics or work to casual outings, with the added benefit of keeping your refreshments cool. It’s a smart investment for its blend of style, comfort, and unexpected functionality.
Why it’s great
- Integrated insulated front pocket for snacks/drinks
- Dedicated padded 15-inch laptop sleeve
- Ergonomic S-curve shoulder straps and padded back panel for comfort
- Durable fabric, zippers, and synthetic leather bottom
Good to know
- Cooler compartment is smaller, limited to front pocket
- Not water resistant; best for light insulation needs rather than heavy ice use
Understanding the Specs
Insulation Material
The type of insulation directly impacts how long your cooler backpack keeps items cold. Common materials include closed-cell foam (excellent for rigid structure and cold retention), polyester (lighter, often used in softer coolers), and polyurethane foam (dense, high-performance). Some coolers also feature radiant barriers like Therma-Flect, which reflect heat away rather than absorbing it, significantly boosting performance in hot conditions.
Capacity & Dimensions
Capacity is usually measured in liters, quarts, or by the number of standard 12-ounce cans it can hold. Pay attention to both the volume and the physical dimensions (D x W x H). A higher can count doesn’t always mean more usable space for varied items like lunch containers or wine bottles. Consider the internal chamber depth and width to ensure it fits your typical provisions, and remember that insulation thickness can reduce internal space.
FAQ
How long do backpack coolers keep things cold?
Are backpack coolers truly leak-proof?
Can I use regular ice in a cooler backpack?
How do I clean my cooler backpack?
Final Thoughts: The Verdict
For most people, the best backpack with cooler compartment winner is the Titan Deep Freeze Ice Wall Backpack Cooler because it offers an unbeatable combination of extended cold retention, smart organization, and comfortable portability at a fantastic value. If you want uncompromising toughness and truly waterproof performance for serious outdoor adventures, grab the RTIC 24 Can Ultra-Tough Backpack Cooler. And for premium cold-holding with innovative, easy access, nothing beats the YETI Hopper M Series Backpack Soft Sided Coolers.
