There’s nothing quite like that first sip of perfectly hot coffee in the morning, especially when you’re rushing out the door. But how often does that blissful moment turn into a lukewarm disappointment just an hour later? We’ve all been there, and it’s a frustration that truly impacts the start of your day.
I’m Mohammad Maruf — the founder and writer behind KitchPrep. With 15+ years immersed in kitchen equipment, I’ve rigorously analyzed travel mug designs, scrutinizing thermal retention data and countless user experiences to identify true performers.
A great travel cup isn’t just about insulation; it’s about a reliable seal, comfortable ergonomics, and materials that preserve your coffee’s flavor, ensuring every sip is as satisfying as the first. To help you navigate the sea of options and find your perfect companion for those precious morning brews, we’ve meticulously evaluated the best travel cup to keep coffee hot that promises enduring warmth and reliable performance.
How To Choose The Best Travel Cup To Keep Coffee Hot
Choosing the right travel cup can feel overwhelming, but focusing on a few key areas will guide you to a mug that genuinely enhances your daily routine. Here’s what my research consistently shows matters most:
Insulation Technology
The core of any great hot beverage cup is its insulation. Look for “double-wall vacuum insulation,” which creates a barrier that prevents heat transfer. This technology is crucial for keeping your coffee piping hot for hours, often without the exterior feeling warm to the touch. Some models even boast specific hours for heat retention, so pay attention to those claims.
Lid Design and Leak-Proofing
A stellar lid is non-negotiable for a travel cup. You need a design that not only seals tightly to prevent spills but also allows for comfortable, controlled sipping. Features like “AutoSeal,” “flip-top,” or “slider” mechanisms are common. Prioritize lids that are explicitly described as “leak-proof” or “spill-proof” and consider how easy they are to disassemble for thorough cleaning, as hidden crevices can harbor old coffee residue.
Materials and Durability
Most high-quality travel cups are made from 18/8 food-grade stainless steel, known for its rust-proof properties and durability. Some premium options feature a ceramic lining, which many coffee aficionados prefer for a pure taste, free from any metallic notes. Always check for BPA-free materials in the lid and seals. Durability also extends to the exterior finish – a powder coat can add grip and resist scuffs, while robust handles or bases enhance stability.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Type | Best For | Key Feature | Amazon |
|---|---|---|---|---|
| Contigo West Loop 3.0 | Travel Mug | Overall Value | AutoSeal Lid | AmazonCheck Price |
| Zojirushi Stainless Steel Mug | Insulated Mug | Ultimate Heat | Exceptional Retention | AmazonCheck Price |
| RTIC Road Trip Travel Mug | Ceramic Lined | Pure Taste | Ceramic Interior | AmazonCheck Price |
| THERMOS Stainless King Tumbler | Vacuum Insulated | Reliable Commuter | Built-in Tea Hook | AmazonCheck Price |
| Owala SmoothSip Slider Tumbler | Leak-Proof | Leakproof Design | SmoothSip Slider | AmazonCheck Price |
| Stanley Transit FlipTop Mug | Lightweight | Lightweight Durability | AeroLight Technology | AmazonCheck Price |
| Hydro Flask Flex Sip Tumbler | Dishwasher Safe | Dishwasher Safe | Pure Taste Finish | AmazonCheck Price |
| Fellow Carter Coffee Mug | Ceramic Interior | Aroma Focused | Wide Mouth Design | AmazonCheck Price |
| YETI Rambler Tumbler | Stainless Steel | Rugged Performance | MagSlider Lid | AmazonCheck Price |
| Takeya Traveler Coffee Mug | Carrying Loop | Grab-and-Go | Flip-Lock Lid | AmazonCheck Price |
| Simple Modern Voyager Tumbler | Flip Lid | Stylish & Practical | Screw-on Lid | AmazonCheck Price |
| Ello Campy Travel Mug | With Handle | Classic Style | Integrated Handle | AmazonCheck Price |
| REDUCE Hot1 Insulated Mug | Temperature Control | Adjustable Sip | Slider Technology | AmazonCheck Price |
| CamelBak Horizon Tumbler | Tri-Mode Lid | Everyday Companion | Nonslip Base | AmazonCheck Price |
| CS COSDDI Vacuum Insulated Tumbler | Spill Proof | Budget Friendly | Compact 12oz | AmazonCheck Price |
In‑Depth Reviews
1. Contigo West Loop 3.0 Travel Mug
Check Latest PriceThe Contigo West Loop 3.0 stands out as a true champion for coffee lovers on the go, offering an exceptional blend of leak-proof security, impressive thermal retention, and user-friendly design. Its signature AUTOSEAL lid is a game-changer, automatically sealing between sips to prevent spills and lock in temperature, making it a reliable companion for any commute or busy day.
Many daily commuters praise its ability to keep drinks hot for up to 16 hours, often having to remove the lid to let their coffee cool down before drinking. The one-handed operation, coupled with a locking function, provides peace of mind when tossing it into a bag or navigating crowded spaces. The lid has also been thoughtfully redesigned for easier cleaning, addressing a common pain point with travel mugs, and it fits comfortably in most car cup holders and under single-serve brewers.
This mug is ideal for anyone seeking a dependable, high-performance travel cup that prioritizes leak-proof functionality and long-lasting heat. Its robust construction and smart design make it a fantastic investment for daily use, ensuring your coffee stays hot and secure, wherever your day takes you.
Why it’s great
- Exceptional 16-hour heat retention
- 100% leak-proof AUTOSEAL lid
- Easy one-handed drinking with lock
- Lid is top-rack dishwasher safe
- Fits most car cup holders
Good to know
- Body requires hand washing
- Taller than some smaller mugs
- May keep coffee *too* hot initially
2. Zojirushi Stainless Steel Mug
Check Latest PriceWhen it comes to sheer thermal performance, the Zojirushi Stainless Steel Mug is in a league of its own. This compact and sleek mug leverages superior vacuum insulation technology to keep beverages astonishingly hot for hours on end, often exceeding expectations and outperforming many competitors.
Long-haul travelers and busy professionals consistently report that their coffee or tea remains “unfailingly hot” for 10+ hours, with some even finding it too hot to drink after a full workday. The lid’s design is a marvel of engineering, easily disassembling into multiple pieces for a truly thorough cleaning, preventing any lingering odors or tastes. Its slim profile is also a favorite feature, fitting perfectly into bags and most car cup holders without being bulky.
This mug is an absolute must-have for anyone whose top priority is uncompromising heat retention. If you need your coffee to stay piping hot from dawn until dusk, the Zojirushi delivers with exceptional reliability and a commitment to cleanliness that sets it apart.
Why it’s great
- Unmatched heat retention (10+ hours)
- SlickSteel interior resists stains & corrosion
- Lid disassembles for easy, thorough cleaning
- Compact, sleek design fits most cup holders
- Secure, leak-proof lockable flip-top lid
Good to know
- Narrow opening for pouring/cleaning
- Hand wash only recommended
- Premium price point
3. RTIC 20oz Road Trip Travel Mug
Check Latest PriceFor those who prioritize the unadulterated flavor of their coffee or tea, the RTIC Road Trip Travel Mug is a standout choice. Its unique ceramic-lined interior ensures that your beverage tastes exactly as it should, completely free from any metallic aftertaste often associated with stainless steel mugs.
Coffee connoisseurs rave about the pure taste experience, noting a significant difference compared to other stainless steel options. Beyond taste, this mug boasts robust double-wall vacuum insulation that keeps drinks hot for up to 6 hours and cold for an impressive 24. The thoughtful design includes a high-placed handle that doesn’t obstruct car cup holders, a leak-resistant lid with a secure snap-down tab, and a dishwasher-safe construction (lid top rack only) for effortless cleaning.
This mug is perfect for anyone who values flavor purity above all else, alongside strong thermal performance and convenient features for daily travel. Its durable build and easy maintenance make it a reliable choice for enjoying your favorite brew on the road or at your desk.
Why it’s great
- Ceramic-lined interior for pure taste
- Keeps drinks hot for 6 hours, cold for 24
- Dishwasher safe (lid top rack)
- Handle doesn’t interfere with cup holders
- Durable 18/8 stainless steel construction
Good to know
- Not 100% leak-proof if fully inverted
- Ceramic interior may stain if not cleaned promptly
- Slightly higher price point
4. THERMOS Stainless King Travel Tumbler
Check Latest PriceThe THERMOS Stainless King Travel Tumbler embodies the brand’s long-standing reputation for exceptional thermal performance and robust construction. Designed for the everyday commuter, it promises to keep your coffee or tea hot for up to 7 hours and cold for an impressive 18, ensuring your beverage is always at your desired temperature.
Users consistently praise its ability to hold heat, with many reporting their coffee still “pretty hot” after many hours, even in colder conditions. The DRINKLOCK sealing lid is a standout feature, providing leak-proof security when closed, which is a huge relief for those who toss their mug into a bag. A clever built-in tea hook also makes it a favorite among tea drinkers. Plus, the lid is easy to disassemble for cleaning, and the entire mug is top-rack dishwasher safe.
This tumbler is an excellent choice for anyone needing a reliable, no-fuss mug for daily travel. Its superior insulation, secure lid, and thoughtful features like the tea hook make it a versatile and dependable companion for keeping your drinks just right, all day long.
Why it’s great
- Keeps drinks hot for up to 7 hours
- Leak-proof DRINKLOCK lid
- Built-in tea hook for tea bags/infusers
- Dishwasher safe (top rack lid)
- Durable 18/8 stainless steel
Good to know
- Lid can be tricky to unscrew sometimes
- Plastic wrapping upon arrival can be annoying
- 16oz might be small for some
5. Owala SmoothSip Slider Insulated Tumbler
Check Latest PriceThe Owala SmoothSip Slider Insulated Stainless Steel Coffee Tumbler is a fantastic option for those who demand absolute leak-proof reliability and a comfortable drinking experience. Its innovative SmoothSip Slider spout is designed for an ultra-comfortable sip while completely preventing splashes and spills when closed.
Many busy individuals, especially those who frequently toss their mug into a bag, praise its “completely leak-proof” performance, even when turned upside down. The double-wall insulation keeps coffee hot for 6 hours and cold for an impressive 24 hours, making it versatile for any beverage. Users also appreciate the simple, clean design and the ability to fully disassemble the lid for thorough cleaning, ensuring hygiene and preventing residue buildup.
This tumbler is ideal for anyone seeking a stylish, durable, and truly leak-proof travel mug that offers a superior sipping experience. If you value peace of mind against spills and appreciate thoughtful design, the Owala SmoothSip Slider is an excellent investment.
Why it’s great
- Completely leak-proof slider lid
- SmoothSip spout for comfortable drinking
- Keeps drinks hot for 6 hours, cold for 24
- Lid is dishwasher safe and fully disassembles
- Stylish and sturdy design
Good to know
- Cup body requires hand washing
- Slider can be stiff to remove initially
- Price is on the higher side
6. Stanley Transit FlipTop Mug
Check Latest PriceThe Stanley Transit FlipTop Mug is a testament to thoughtful engineering, combining remarkable lightness with robust durability, thanks to its AeroLight spun-steel technology. This mug is designed for the active individual, ensuring your coffee stays hot without adding unnecessary bulk to your daily carry.
Commuters and adventurers alike are impressed by its weight, being 33% lighter than standard stainless steel bottles, making it incredibly easy to transport. Despite its light build, it delivers on temperature control, keeping drinks hot for up to 6 hours. The leak-proof flip-top lid is a standout, sealing securely to prevent spills even when jostled in a bag. Plus, it’s made with recycled stainless steel and is fully dishwasher safe, aligning with both performance and sustainability.
This mug is an excellent choice for anyone prioritizing a lightweight, durable, and spill-proof solution for their hot beverages. Its slim profile and reliable performance make it a strong contender for daily use, whether you’re heading to the office or exploring the outdoors.
Why it’s great
- 33% lighter with AeroLight technology
- Leak-proof flip-top lid
- Keeps drinks hot for up to 6 hours
- Made with 18/8 recycled stainless steel
- Fully dishwasher safe
Good to know
- Lid can be tight to open initially
- No handle for carrying
- 16oz capacity might be small for some
7. Hydro Flask Flex Sip Coffee Tumbler
Check Latest PriceThe Hydro Flask Flex Sip Coffee Tumbler brings the brand’s renowned insulation and durability to your daily coffee ritual. Designed specifically for hot beverages, this 16 oz tumbler ensures your coffee stays warm for up to 12 hours, while maintaining its pure taste thanks to pro-grade stainless steel.
Hydro Flask enthusiasts appreciate the unique Flex Sip Lid, which is leak-proof when closed and designed for easy sipping, allowing you to twist it shut and confidently toss it into your bag. Many also highlight the ease of cleaning, as both the lid and bottle are dishwasher safe, and the lid disassembles into four parts to prevent mold buildup. Its cupholder-friendly design ensures it fits seamlessly into your car or on your desk.
This tumbler is an excellent choice for those who prioritize both long-lasting heat retention and effortless cleaning. If you’re seeking a durable, taste-preserving, and genuinely dishwasher-safe travel mug for your daily coffee or tea, the Hydro Flask Flex Sip is a reliable companion.
Why it’s great
- Keeps drinks hot for up to 12 hours
- Leak-proof Flex Sip Lid
- Entire mug and lid are dishwasher safe
- Pro-grade stainless steel for pure taste
- Lid disassembles for thorough cleaning
Good to know
- 16oz might be too small for some
- Some users initially struggled with lid leaks
- No handle for carrying
8. Fellow Carter Coffee Mug
Check Latest PriceThe Fellow Carter Coffee Mug is designed for the discerning coffee enthusiast who believes the drinking experience extends beyond just temperature retention. Its wide mouth and ceramic interior are crafted to enhance the aroma and flavor of your brew, making every sip feel like you’re drinking from your favorite ceramic mug at home, even on the go.
Coffee lovers consistently highlight the “mug-inspired mouth” and tapered thin lip, which allows for a full sensory experience, appreciating the coffee’s aroma before drinking. The 304 18/8 double-wall vacuum insulation keeps coffee hot for up to 12 hours, and the leak-proof, quick twist-locking lid provides confidence for tossing it into a bag without worries. Plus, it’s proudly dishwasher safe, making cleanup a breeze.
This mug is an excellent choice for those who value the full sensory experience of their coffee, from aroma to taste, alongside strong thermal performance and leak-proof portability. If you’re looking to replicate your home coffee ritual on the go, the Fellow Carter mug is a thoughtful and stylish option.
Why it’s great
- Wide mouth for enhanced aroma
- Ceramic interior for pure taste
- Keeps drinks hot for up to 12 hours
- Leak-proof quick twist-locking lid
- Dishwasher safe for easy cleaning
Good to know
- Does not fit all car cup holders
- Plastic cap threading may retain odors if not dried
- Interior ceramic coating finish can vary
9. YETI Rambler 20 oz Tumbler
Check Latest PriceThe YETI Rambler 20 oz Stainless Steel Tumbler is synonymous with rugged durability and reliable temperature retention, making it a go-to choice for those who demand performance in challenging environments. Built with 18/8 stainless steel and double-wall vacuum insulation, it’s designed to withstand abuse while keeping your drinks just right.
Outdoor enthusiasts and busy parents praise its “YETI tough” construction and impressive ability to keep coffee hot for several hours, often up to 4 hours, and cold drinks chilled all day. The iconic MagSlider Lid, unique to Yeti, uses magnets for easy opening and closing, and is remarkably simple to clean. Its “No Sweat Design” ensures your hands stay dry, and it fits perfectly in standard car cup holders.
This tumbler is an excellent choice for anyone seeking a premium, highly durable mug that can handle anything life throws at it. If you need a robust companion that consistently keeps your coffee hot and is easy to maintain, the YETI Rambler is a proven performer.
Why it’s great
- Rugged 18/8 stainless steel construction
- MagSlider Lid for easy cleaning
- Keeps coffee hot for multiple hours
- No Sweat Design keeps hands dry
- Dishwasher safe and BPA-free
Good to know
- MagSlider Lid is not fully leak-proof
- Higher price point
- 20oz might be bulky for some small hands
10. Takeya Traveler Leakproof Coffee Mug
Check Latest PriceThe Takeya Traveler Leakproof Coffee Mug is a thoughtfully designed piece of insulated drinkware, perfect for those who need a reliable and easy-to-carry solution for their daily caffeine fix. Its standout feature is the Flip-Lock lid, which offers both secure leak-proof sealing and effortless one-handed drinking.
Busy individuals praise its robust leak-proof seal, confidently tossing it into bags without fear of spills. The double-wall vacuum insulation keeps coffee hot for up to 12 hours, ensuring your beverage is ready when you are. Many also appreciate the integrated carrying loop, making it simple to transport when your hands are full, and the contoured lip designed for comfortable sipping. It’s also compatible with most single-serve brewers, adding to its convenience.
This mug is an excellent choice for anyone seeking a truly leak-proof and portable travel mug with a convenient carrying solution. Its thoughtful lid design and strong insulation make it a reliable companion for commutes, hikes, or simply navigating a busy day.
Why it’s great
- Leak-proof Flip-Lock lid
- Integrated carrying loop
- Keeps coffee hot for up to 12 hours
- One-touch open/close for easy drinking
- Single-serve brewer compatible
Good to know
- Handle material may be brittle
- Lid requires hand washing
- 17oz capacity might be limiting for some
11. Simple Modern Voyager Tumbler
Check Latest PriceThe Simple Modern Voyager Travel Coffee Mug Tumbler offers a delightful blend of aesthetic appeal and practical functionality, making it a favorite for those who value both style and performance. Its durable stainless steel construction and double-wall insulation ensure your beverages stay at temperature for hours.
Busy moms and style-conscious individuals appreciate its cute design and the screw-on flip lid, which provides a secure, leak-proof seal. Many users report coffee staying hot for extended periods, even after being forgotten for a while. It’s cupholder-friendly and comes with two reusable straws for versatility, though the flip lid is perfect for hot drinks. A significant plus is its dishwasher-safe design, simplifying cleanup.
This tumbler is an excellent choice for anyone seeking a stylish, well-insulated, and easy-to-clean travel mug for daily use. If you appreciate a mug that looks good, performs reliably, and offers hassle-free maintenance, the Simple Modern Voyager is a fantastic option.
Why it’s great
- Double-wall vacuum insulation
- Leak-proof screw-on flip lid
- Completely dishwasher safe
- Comes with two reusable straws
- Stylish design and finish
Good to know
- Slightly pricey for its size
- Lip design can feel awkward for some
- May rock slightly in some cup holders
12. Ello Campy Stainless Steel Travel Mug
Check Latest PriceThe Ello Campy Stainless Steel Travel Mug marries a charming, classic camp-cup aesthetic with modern insulation technology, making it a delightful companion for both indoor and outdoor adventures. Its vacuum-insulated design is built to keep your drinks hot for 5 hours and cold for 20, ensuring your beverage is always at its best.
Users are drawn to its sleek shape and comfortable cork-padded handle, which many find superior to other designs. The leak-proof sealing slider lid provides confidence, allowing you to take it anywhere without worrying about spills. Many avid users own multiple colors, praising its consistent performance and comfortable grip, making it a frequent gift choice for friends and family.
This mug is an excellent choice for anyone who appreciates a travel cup with a distinct, appealing style and reliable thermal performance. If you’re looking for a mug that feels good in your hand, keeps your coffee hot, and adds a touch of classic charm to your day, the Ello Campy is a strong contender.
Why it’s great
- Keeps drinks hot for up to 5 hours
- Leak-proof sealing slider lid
- Integrated, comfortable carry handle
- Lid is top-rack dishwasher safe
- Stylish, classic camp cup design
Good to know
- Body requires hand washing (due to cork)
- May not fit all car cup holders
- Lid can be finicky to align correctly
13. REDUCE Hot1 Insulated Mug
Check Latest PriceThe REDUCE Hot1 Stainless Steel Insulated Mug is thoughtfully designed for those who appreciate sipping their hot beverages at their own pace, thanks to its innovative temperature-adjusting lid. This mug aims to provide a consistent, enjoyable coffee or tea experience throughout your busy day.
Many users commend its ability to keep coffee hot for up to 6 hours, allowing them to savor their drink over extended periods. The unique slider technology on the lid offers precise control over beverage flow and temperature, preventing accidental splashes. Its durable 18/8 food-grade stainless steel construction and 360-welded handle ensure longevity, while its cupholder-friendly design makes it ideal for commutes. Plus, it’s dishwasher safe for ultimate convenience.
This mug is an excellent choice for anyone seeking a durable, well-insulated travel cup with a customizable sipping experience. If you value the ability to control your drink’s temperature and flow, combined with easy cleaning and robust construction, the REDUCE Hot1 is a solid investment.
Why it’s great
- Temperature-adjusting lid for ideal sipping
- Keeps drinks hot for up to 6 hours
- Durable 18/8 food-grade stainless steel
- Cupholder-friendly design
- Dishwasher safe for easy cleaning
Good to know
- Paint may chip with frequent dishwashing
- Not 100% leak-proof if inverted
- Handle lacks padding
14. CamelBak Horizon 16oz Tumbler
Check Latest PriceThe CamelBak Horizon 16oz Tumbler is a reliable and stylish everyday coffee cup, designed for consistent performance and convenience. Its double-wall vacuum insulation ensures your coffee stays hot for a good amount of time, making it a dependable choice for your morning commute or work day.
Daily users frequently praise its perfect size, fitting neatly under most coffee makers and into car cup holders. It keeps coffee hot for 2-3 hours, with some noting it stays warm even until lunchtime. The Tri-mode lid offers flow control, and the nonslip silicone base adds stability. Many also appreciate its durable 18/8 stainless steel construction and full powder coat finish, which holds up well through countless dishwasher cycles.
This tumbler is an excellent choice for anyone seeking a practical, durable, and easy-to-clean mug for daily coffee consumption. If you need a mug that fits seamlessly into your routine and reliably keeps your coffee warm, the CamelBak Horizon is a solid, well-regarded option.
Why it’s great
- Double-wall vacuum insulated
- Dishwasher safe for easy cleaning
- Nonslip silicone base
- Durable 18/8 stainless steel
- Fits most car cup holders
Good to know
- Lid is not fully spill-proof if tipped
- 16oz capacity might be small for some
- No handle for carrying
15. CS COSDDI 12 oz Tumbler
Check Latest PriceThe CS COSDDI 12 oz Stainless Steel Vacuum Insulated Tumbler offers an incredibly affordable yet surprisingly effective solution for keeping your coffee hot on the go. This compact and stylish mug provides solid performance without breaking the bank, making it a fantastic value option.
Budget-conscious coffee drinkers consistently highlight its impressive ability to keep coffee piping hot for 3-4 hours, often needing to remove the lid to let it cool down. The airtight silicone seal on the lid and rubber bottom prevent slipping, providing a sense of security. Its small, narrow design is perfect for easy carrying and fits most car cup holders and coffee makers, making it a convenient daily companion.
This tumbler is an excellent choice for anyone seeking a reliable, leak-proof, and budget-friendly travel cup for their daily coffee. If you prioritize value and compact portability, the CS COSDDI offers a compelling package that punches well above its price point.
Why it’s great
- Great value for the price
- Keeps coffee hot for 3-4 hours
- Airtight, leak-proof silicone seal
- Compact and easy to carry 12oz size
- Fits most car cup holders
Good to know
- Hand wash only recommended
- Rubber seal on lid may soften over time
- 12oz capacity might be too small for some
Understanding the Specs
Vacuum Insulation
At the heart of every effective travel cup forhot coffee lies vacuum insulation. This technology involves creating a vacuum between two walls of stainless steel. This empty space acts as a barrier, preventing heat from transferring via conduction or convection. Essentially, it isolates your hot coffee from the colder outside environment, keeping it hotter for significantly longer periods. The better the vacuum seal, the more efficient the insulation, directly impacting how many hours your coffee stays piping hot.
Lid Mechanisms & Materials
The lid is just as crucial as the cup’s body for heat retention and spill prevention. Common mechanisms include flip-tops, slider lids, and auto-seal buttons. Each offers varying degrees of leak-proofing and ease of use. Materials like food-grade silicone and BPA-free plastics are standard for seals and drinking spouts. A well-designed lid not only prevents heat escape but also ensures a comfortable, controlled sip. Look for lids that are easy to disassemble for thorough cleaning, preventing coffee residue buildup and maintaining hygiene.
FAQ
How long will coffee stay hot in a travel cup?
Are travel cups truly leak-proof?
Can I put my travel cup in the dishwasher?
Why does my coffee taste metallic in some travel cups?
Final Thoughts: The Verdict
For most people, the best travel cup to keep coffee hot winner is the Contigo West Loop 3.0 Travel Mug because it offers an unbeatable combination of leak-proof security, impressive heat retention, and user-friendly design at a mid-range price. If you want uncompromising heat retention that lasts all day, grab the Zojirushi Stainless Steel Mug. And for a pure, untainted coffee flavor, nothing beats the RTIC 20oz Road Trip Travel Mug with its ceramic-lined interior.
