Whether you take your coffee hot or iced, a reliable thermos will keep your drink at its ideal temperature for hours. In fact, the century-old vacuum technology used in thermoses was originally invented to keep liquid hydrogen (aka rocket fuel) cold. Today, everyone from campers to commuters use thermoses. Most are affordable, so picking the right one comes down to your specific needs. Do you want a trigger-action lid to sip while driving or a leak-proof bottle you can trust in your purse? To help you decide which coffee thermos is right for you, wetestedthem side-by-side and evaluated each on its design, size, ability to keep drinks hot and/or cold, and overall value. Many hot and iced coffees were consumed and transported (to make sure there weren't any leaks or spills in transit) by our home tester to make sure these thermoses are truly the best. Our Top Picks Runner-Up, Best Overall: Thermos Vacuum Insulated Compact Beverage Bottle at Amazon ($20) Best Commuter: Runner-Up, Best Commuter: Best Large Capacity: Best High-Tech: In This Article Our Picks How We Tested Travel Mugs Other Options We Tested What to Look for FAQs Why Trust The Spruce Eats? What We Like Leakproof Excellent temperature retention Extremely durable What We Don't Like Hard to get last sips out Not the easiest to drink while moving A popular thermos, especially for people who love the outdoors, is the Stanley Classic Legendary Bottle. Its durable stainless steel is designed to withstand the wear and tear from all kinds of adventures. Plus, it's backed by Stanley's lifetime guarantee. It's available in five different sizes, starting at less than 1 quart and working up to 2.5 quarts. We tested the 1.5-quart model and gave it an overall positive review. The lid has two parts—a stainless steel cup and plastic stopper—that successfully kept it from leaking during our testing process. One downside to the lid, however, is that it's not easy to sip from while walking unless you eschew the rubber stopper and only cover the lid with the stainless steel cup. Note that the 1.5-quart model is too large to fit in a cup holder (which is expected given its large capacity). As far as temperature retention goes, Stanley claims that the 1.5-quart model keeps drinks warm for 40 hours and cold for 35 hours without ice. Our testing corroborated the first claim, as we filled the thermos with hot coffee and, 40 hours later, found it still drinkable and warm (note that we first rinsed the thermos with nearly boiling water to preheat the material before adding coffee). When testing cold drinks, however, we used refrigerated coffee without ice and found that the temperature warmed up slightly over 35 hours. The coffee remained suitable to drink, though, which is why we still recommend the item. As far as cleaning goes, the opening of the thermos was too small for us to clean the inside by hand, but this is a non-issue in most cases because the item is dishwasher safe. Capacity: 0.6, 1, 1.5, 2, and 2.5 quarts | Dimensions: 4.7 x 3.9 x 14.1 inches (1.5-quart model) | Color Options: Yes | Warranty: Lifetime What We Like Leakproof Multiple sizes available Excellent temperature retention What We Don't Like Hard to drink on the go A few of the main details we look for in coffee thermoses are convenience, reliability, and affordability. Combine all three and you get the Thermos Vacuum Insulated Compact Beverage Bottle. Whether it's for yourself or a gift for someone else, this classic thermos gets the job done and looks good doing so. After testing the item firsthand, we found that it lives up to the brand's claim of keeping coffee hot for 12 hours and iced coffee cold for 24 hours. Both cups of coffee tasted just as good after that time had elapsed, too. One quick tip: Fill the thermos with hot water for a couple of minutes before your coffee is ready. Doing this will preheat the material and ensure your coffee stays hot longer. (This holds true for any stainless steel coffee thermos.) Another observation we noted is that the thermos' two-part lid is easy to open and close, but will take longer than thermoses with a one-part lid. There are pros and cons to this. On one hand, it prevents any leaks, even after we shook the thermos upside down. On the other, it's not ideal for commuters, as the lid is not designed to be opened while driving. There also isn't any indication that this thermos is dishwasher safe, so we cleaned it by putting a drop of dish soap inside and rinsing it with hot water. Capacity: 16, 25 and 32 ounces | Dimensions: 2.6 x 2.6 x 10 inches (16-ounce model) | Color Options: No | Warranty: 5-year limited What We Like Value for money Can lock and unlock with one hand Effective autolock and anti-spill lid What We Don't Like Body is hand-wash only Contigo Autoseal West Loop Stainless Steel Travel Mug Review The Contigo Autoseal West Loop is an unbeatable value pick that's available in dozens of colors and four sizes. The brand says it keeps coffee hot for seven hours and iced coffee chilled for up to 18 hours, and we found this accurate after testing it. The coffee retained high heat for three hours and was still warm after the seven-hour mark. Ice water remained very cold past the 20-hour mark too, even though the ice cubes melted after 12 hours. One of the few criticisms we have after testing is that the thermos isn't the easiest to clean, as only the lid is dishwasher safe. The lid is easy to use overall though; it has a simple button to open and close. It's also spill-proof, which is a big plus. Capacity: 14, 16, 20, and 24 ounces | Dimensions: 3.5 x 7.8 inches (16-ounce model) | Color Options: Yes | Warranty: Lifetime limited What We Like Especially good for iced coffee Leakproof Convenient rubber grip What We Don't Like Body is hand-wash only If you like sipping hot coffee during your morning drive, walk, or ride, try the Contigo Byron Travel Mug with SnapSeal Technology. The thermos is available in three sizes: 16, 20, and 24 ounces. The 20-ounce model is designed to keep coffee hot for seven hours and cold for 18. When we tested this firsthand, we found both figures to be accurate. The drip coffee we poured in was hot and drinkable when we checked it again, and the cold coffee was still tasty, even without ice. The Byron also has a one-of-a-kind lid that, according to our testing, is convenient while walking and easy to use while driving. It even fits in a standard cupholder. Thanks to the brand's SnapSeal technology, the Byron mug is completely leakproof; there won't be any spills whether you're on a crowded subway or throwing the thermos in a backpack. One drawback to this otherwise highly-rated product is that the stainless steel body is hand-wash only, yet the lid opening is too small to fit your hand inside. Instead, a long, non-abrasive bottle brush is recommended. And the Byron still works like new after we've owned and used it for four years. The exterior is scratched in places, but the lid opens and closes smoothly and continues to prevent even the slightest leak. Capacity: 16, 20, and 24 ounces | Dimensions: 3.25 x 3.25 x 8 inches (20-ounce model) | Color Options: Yes | Warranty: Lifetime limited What We Like Fits most cupholders Dishwasher safe Comfortable to hold What We Don't Like Handle may not fit some cupholders Thermos Stainless King Travel Mug Review The Thermos Stainless King Travel Tumbler is everything you could want in a commuter mug. The sliding lid is easy to open while driving or walking. It can be purchased with or without a handle depending on your preference. It's large and durable, but slim enough to fit in most cupholders (especially when purchased without a handle). Tea lovers can even enjoy the mug because it has a built-in hook for tea bags. We gave the Stainless King an outstanding review—the mug stands up to its claims and will keep your coffee hot for most, if not all, of your shift, even on a cold day. The interior and exterior steel also prevent any annoying condensation. We love the DrinkLock Technology, which allows the lid to form a tight seal so no liquid (or heat) passes through it. Keep in mind that the lid should be disassembled and washed by hand. Capacity: 16 ounces | Dimensions: 4.9 x 3.3 x 7.8 inches | Color Options: Yes | Warranty: Lifetime limited Get the Best of Both Worlds With These Coffee and Espresso Machine Combos What We Like Large capacity Affordable Lightweight, yet durable What We Don't Like Slow pouring Hard to clean There's plenty of coffee to go around with the Cresimo Thermal Coffee Carafe. Its 68-ounce capacity makes it a worthwhile pick for small business owners, avid hosts, and more. The classic stainless steel design with a black-accented cap matches everything from kitchen décor to conference rooms and even formal settings. When we tested the item, we found that the vacuum insulation kept coffee hot for 12 hours and iced coffee cold for a full 24 hours. It also has a comfortable handle and an easy-to-use, no-spill spout. The pouring is slower than expected, but this will help you and your guests avoid making a mess. Unfortunately, we found it difficult to get the last couple of ounces of coffee out, the spout continues pouring for a second even after you release the trigger, and the lid opening is too small to clean inside the carafe by hand, so you will need a long brush to get all the nooks and crannies. Capacity: 68 ounces | Dimensions: 6 x 6 x 10.8 inches | Color Options: No | Warranty: 1 year What We Like Leakproof Dishwasher safe Convenient handle What We Don't Like Stress mark appears on latch The Stanley Classic Easy-Pour Growler is a 64-ounce vacuum-insulated container that's great for camping,hiking, hunting, and more. Hugely popular and just plain huge, the item is leakproof, dishwasher safe, and backed by a lifetime warranty. The growler still looks brand new after we've used it for four years and taking it on numerous hikes and camping trips. It's available in three colors and has a handle that makes pouring easier. After testing the growler, we were impressed by its heavy-duty design and the length of time it was able to keep drinks at their ideal temperature. Coffee stayed warm (though, not piping hot) for 18 hours, and iced coffee remained cold for a whopping four days even though the ice cubes melted over that time. The clasp-style lid takes a little finger strength to open, but that just demonstrates how sturdy and well-built the item is. While the growler is completely leakproof, it may be too large for tossing in smaller hiking backpacks. As a result, you may want to attach it to your bag with a carabiner. When it comes time to wash it, the opening is too small to fit a hand inside, but fortunately the growler is dishwasher safe, so it’s still very simple to clean. Capacity: 64 ounces | Dimensions: 6.48 x 4.92 x 11.57 inches | Color Options: Yes | Warranty: Lifetime The 10 Best Cold Brew Coffee Makers of 2024 What We Like Excellent temperature retention Leakproof Multiple sizes and colors What We Don't Like Poor lid design There are so many thermoses on the market that will keep your coffee hot and won’t spill, yet they have a ho-hum, metallic design. If you're looking for something a bit more fun, try the Hydro Flask, which still has all the benefits of a classic thermos. You can buy one of these vacuum-insulated stainless steel coffee or beverage bottles in many colors, including Pacific, Carnation, Rain, and Olive. The sleek cylindrical design, matte-colored steel, and minimalist cap give the Hydro Flask one of the coolest looks on the market. While our testing process confirmed that this thermos keeps drinks hot for six hours or cold for four, we were disappointed by the lid design—it is surprisingly difficult to take the entire lid off when filling the thermos as it feels a little bit sticky. Even sliding it open to take a sip wasn't very smooth. The pros are that it's cupholder friendly, generally safe to place upright in a backpack (it only leaked after being shaken upside down), and can be cleaned in a dishwasher on the top rack, though we were able to fit a sponge into the mug and reach all parts. Hydro Flask also guarantees the item for life, and we still have the mug after four years. It's not the travel mug we use most often, as we typically use a larger mug, but it's held up remarkably well and shows no signs of slowing down. Capacity: 12, 16, and 20 ounces | Dimensions: 7.76 x 3.31 x 3.07 inches (16-ounce model) | Color Options: Yes | Warranty: Lifetime limited The 8 Best Flasks of 2024, Tested and Reviewed Ember Travel Mug² Review What We Like Touchscreen display Battery lasts up to three hours 360-degree leakproof lid What We Don't Like Expensive Now you can keep your coffee hot through the morning with smart technology. The Ember Travel Mug² uses both app connectivity and a sleek, high-tech design to do so—and makes sure nothing spills or leaks in the process. You can use the thermos' touchscreen panel to control its temperature, or you can do so by pairing it with the Ember app on your smartphone. The panel can be particularly useful when you're driving and don't want to pull out your phone. We found that the thermos could keep our drinks hot for up to three hours and that the battery lasts for about as long. Another standout feature (one that is also convenient for driving) is the thermos' lid: It is leakproof, only needs a push to open, and gives you a 360-degree drinking experience, meaning you can essentially sip from any side of the mug. Keep in mind that with all the technology does come a higher price tag. Capacity: 12 ounces | Dimensions: Mug is 3.14 x 7.9 inches and base is 5.63 x 3.88 inches | Color Options: No | Warranty: 1-year limited Atlas Coffee Club Review 2024: A Travel-Themed Experience for Coffee Lovers Final Verdict Affordable and built to last, the Stanley Classic Legendary Vacuum Insulated Bottle gets the job done whether you're camping or commuting. For a top-performing option that's a little less expensive, our tester really liked the Contigo Autoseal West Loop Vacuum Insulated Travel Mug. We have collected data on dozens of thermoses and travel mugs over the years. To create this article, we took the highest-reviewed options from previous tests and sent a batch of seven new coffee thermoses to one of our writers so he could test them side by side. From there, we narrowed down the best coffee thermoses, which are seen above. Here's what our testing process involved. Rebekah Joan is a writer and blogger located in Northwestern Pennsylvania. She has written for The Spruce Eats since 2019. She has also written for Introvert, Dear, and on her lifestyle blog atwww.rebekah-joan.com. Cheyenne Elwellis a freelance writer specializing in food and coffee. Her work has appeared in Business Insider, Insider, MSN, and her coffee blog BakedBrewedBeautiful.com. Suzie Dundas is a freelance writer and editor based in Lake Tahoe, California. She writes primarily about travel, the outdoors, and millennial culture. Her work has appeared in Forbes, Fodor's, SkyLife Magazine, and Outdoor Sports Guide, among other publications. Derek Rose has been The Spruce Eats' coffee and tea expert since 2019. He researches a variety of coffee products, from measuring scoops to commercial espresso machines, and interviews field experts for their insight. He personally tested seven coffee thermoses on this list. Learn More About How We Test Products Will you be using your thermos for hot coffee every morning, or do you prefer iced coffee? Some mugs keep beverages cold for hours upon hours but lack in the heat department, and vice versa. No matter the type of drink you plan to store, there’s an option on our list that will suit your needs. A huge coffee thermos may be great for the office, but if you’re bringing it on a walk or a bike ride, a smaller, lighter model may make more sense. Also, some larger thermoses might not fit in your car’s cupholder, so it’s wise to check those dimensions beforehand. One factor that differentiates thermoses is the way you drink out of them. Typical options include a trigger-action lid, which is especially handy while sipping on the go, or a twist lid, which is common among leakproof models. Thermoses don't often have straws, like other reusable mug brands, but you can always buy a permanent straw separately if this is the style you prefer. Stainless steel is the most common material for thermoses, but there are plastic ones too. Generally, steel is best (even if it costs extra) because it's more durable and better at insulating liquids. If you glance at the product description of any vacuum thermos, you will likely come across the phrase "18/8 stainless steel." It's a type of stainless steel made from 18 percent chromium and 8 percent nickel. Graham Nearn of the Stanley brand says 18/8 stainless steel is commonly used for drinkware because it's "food-grade, durable, and resistant to corrosion." Many thermoses can go in the dishwasher, but you should check manufacturer recommendations to verify. Some thermoses are labeled dishwasher safe, yet the brand may recommend cleaning them by hand to protect the material and finish. If your thermos is hand-wash only, you can likely clean it with water, dish soap, and a soft cloth or bottle brush. Start by filling the thermos with warm water and a few drops of dish soap, then let it sit for three to five minutes before scrubbing or rinsing. Silicone gaskets can be cleaned by soaking them in white vinegar, lemon juice, or a mixture or water and baking soda. Plenty of coffee and tea drinkers are familiar with set-in stains and odors in their thermoses. In those instances, cleaning with a combination of vinegar and baking soda should make your thermos like new again. The best thermoses can keep coffee hot up to 24 hours. These are usually vacuum-insulated and made of stainless steel—a material that retains heat longer than plastic. The majority of thermoses fall below this 24-hour figure, however. A more common range is anywhere from five to 12 hours. You should preheat your thermos by rinsing it with hot water before use to maximize its heat retention. As for the iced coffee lovers, you're in luck, as thermoses typically keep drinks cold longer than they keep them warm—no matter what material they are made from. The terms "hot" and "cold" are so subjective, however, that we asked Graham Nearn of the Stanley brand to define a generally acceptable temperature range. He told us that during Stanley's testing process, a drink is considered hot if it's between 140 to 203 degrees and cold if it falls between 39 and 50 degrees. Metal thermoses cannot be recycled through regular curbside recycling pickup. Instead, they can be recycled by dropping them off at your local metal recycling facility. Plastic travel mugs can usually be recycled through your standard home recycling process, but it varies based on the type of plastic (often labeled on the bottom of a mug) as well as local recycling policies. There are a number of ways to repurpose old thermoses, too, like using them as vases, change holders, dry food containers, and more. Most brands do not advise putting milk or creamer in thermoses unless it's for a very short period of time. Storing dairy products at warm temperatures can lead to bacteria growth, especially if the thermos is not cleaned properly afterward. This opinion was echoed by Graham Nearn of the Stanley brand who told us, "We don’t recommend putting milk or dairy products in Stanley vacuum bottles or food jars for extended periods of time, as bacteria growth can occur at certain temperatures." Users should not put thermoses in the freezer. The liquid would freeze, expand, and likely damage the thermos—and that's not to mention the mess it would make. This piece was written byDerek Rose, the coffee and tea expert for The Spruce Eats. He reviewed the majority of thermoses on this list and consulted reviews from several of our other testers. Derek's work has also appeared in Forbes, Angi, and SPY. Graham Nearn, the Senior Vice President of Product Creation & Design for PMI Worldwide, was interviewed for this piece. He oversees the Stanley brand, which has manufactured vacuum flasks and more since 1913. We Tested More Than 20 Coffee Makers With Grinders to Find the Best Options:max_bytes(150000):strip_icc()/Best_Coffee_Thermoses_Group_Shot_HeroHorizontal-d7cfdbb37016443997b50b920f776bf7.jpg "We Tested the Best Coffee Thermoses So You Can Stay Caffeinated On the Go (1)")
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Runner-Up, Best Commuter
Thermos Stainless King Travel Mug
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Best Large Capacity
Stanley Classic Easy-Pour Growler
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Best Design
Hydro Flask Wide Mouth Flex Sip Lid Bottle
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How We Tested Travel Mugs
We Observed
We Rated
About Our Testers
Other Options We Tested
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What to Look for in a Coffee Thermos
Hot vs. Cold
Size
Lid Style
Material
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FAQs
How do I clean a thermos?
How long does coffee stay hot in a thermos?
How do I dispose of an old thermos?
Can I add milk to my coffee if it’s in a thermos?
Can I put a thermos in the freezer?
Why Trust The Spruce Eats?
Sources
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Article Sources
The Spruce Eats uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
University of Connecticut, College of Agriculture, Health and Natural Resources. Dairy Foods: Milk, Cheese, Yogurt, Butter, Ice Cream.
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