Best Coffee Thermos (Top-Rated Insulated Flasks)

best coffee thermos

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Wouldn’t it be great if you could enjoy hot coffee in the car, at work, or even out when camping? Guess what, it’s totally possible with a thermos for coffee.

No longer will you be limited to drinking your favorite coffee at home. Grab one of these flasks and sip on your hot drink from absolutely anywhere.

Sounds great, right? Piping hot coffee in the daily commute. The problem is not all insulated coffee thermoses are up to the job. Sure they might look ok, but you will soon be disappointed with how long they keep your coffee hot.

Our Top Pick: Best Value

But don’t worry. Below I have gone over a few key indicators you should look for when buying a new coffee thermos.

Once you’ve digested that information, make sure to keep on reading because I have picked out some of my recommendations.

Why Should I Get A Thermos For Coffee?

Do you find that you’re rushing out of the door in the morning and don’t have enough time to grab a coffee? This is where a good thermos can help.

If you’re anything like me, I often struggle to get my caffeine fix, especially when I’m juggling getting the kids ready for school, making sure I’ve had a shave, and not forgetting to let the dog out for his morning ritual.

That’s why I can’t live without my Thermos because now I can make my coffee in a hurry and then drink it while sitting in the car.

But the Thermos isn’t just a heaven-sent for hectic mornings. It’s also great for taking to the beach or on camping trips.

With so many different thermoses available in the marketplace, you’ll want to make sure you purchase one that is just right for your coffee-drinking habits.

The designs can vary depending on what you’ll be doing with it the most and where you’re going to use it.

The Best Coffee Thermoses

It doesn’t matter if you want a coffee flask for camping, work, or taking with you on a long road trip.

Below we have handpicked some of the best thermoses for keeping your coffee hot for longer. Most of these will still deliver piping hot coffee by the time you clock out from work.

Thermos Stainless King

Thermos Stainless King


You know you’re getting the best Thermos when you’re buying one from the original company that spawned the term “Thermos.”

Thermos has a vast selection of insulated coffee mugs, bottles, food jars, and flasks, but one of their most popular thermoses is the Stainless King Beverage Bottle.

The classic-looking Thermos stainless king can keep your coffee hot for up to a whopping 24 hours; that’s impressive.

The Thermos vacuum insulation technology can also keep cold beverages ice cold, so taking a cold brew coffee with you when you leave the house in the summer months is also an option.

The stainless steel body is always cool to touch when filled with hot coffee, and for those days you decide you want to store a cold beverage, the outer walls of the Stainless King are surprisingly sweatproof.

Available in various sizes and colors such as Cranberry, Matte Black, Midnight Blue, and plain stainless steel, there should be a color for you.

What We Love

  • Keep liquids hot for 24 hours or cold for up to 24 hours.
  • Insulated stainless steel serving cup.
  • Has a built-in cup.
  • Top-rack dishwasher safe.

Take Note

  • The handle can be a bit loose and rattles.

YETI Rambler Stainless Steel Vacuum Insulated Tumbler with Lid

YETI Rambler Stainless Steel Vacuum Insulated Tumbler with Lid


The YETI Rambler is an “over-engineered” flask that provides some of the best thermos technology to keep your coffee piping hot longer.

The double walls of the Yeti tumbler are made of 18/8 stainless steel, so durability isn’t a problem – it’s built to last!

The insulation design ensures that your hot liquid won’t drip or slosh about, so you don’t have to worry about it leaking in your car or your morning walk.

What makes the Yeti Rambler unique is the “no-sweat” design that eliminates any condensation from building up on the outside of the flask – so water stains on your coffee table are a thing of the past!

The Rambler is a step above the competition when it comes to insulation technology. A must-have insulated travel mug for any coffee lover.

What We Love

  • BPA-free.
  • They are sized to fit in all standard-sized cup holders.
  • Dishwasher safe.

Take Note

  • Make sure you’re buying a genuine YETI – there are many fakes.

Zojirushi Stainless Steel Travel Mug

Zojirushi Stainless Steel Travel Mug


The Zojirushi Thermos is perfect for the solo coffee drinker, with sizes ranging from 12 to 20 ounces. These lightweight thermos mugs are small, compact, and take up minimal space while maximizing capacity – they are narrow enough to fit into your car’s cup holder.

A neat feature of this particular Zojirushi mug is the pictograph lock for a more secure fitting lid.

The Zojirushi Thermos has an extensive range of colors to choose from, like Black, Cinnamon Gold, Clean Red, Coral Pink, Pearl Pink, Slate Gray, and Turquoise Blue.

The heat retention is also guaranteed for five years which is practically a lifetime in the world of Thermos flasks.

What We Love

  • Compact design takes minimal space.
  • Stopper disassembles for thorough cleaning.
  • It is made of BPA-free plastic and stainless steel.

Take Note

  • It might leak when left horizontal in a bag.
  • Exterior body paint can scratch off easily.

Stanley Classic Vacuum Bottle

Stanley Classic Vacuum Bottle


Ask your granddad about the Stanley classic thermos flask, and I bet he could tell you a few stories.

The classic Stanley vacuum bottle has been around for what seems like forever, and even to this day, it still holds onto its classic hammer tone paint finish appearance.

The Stanley insulated flask keeps hot beverages piping hot for up to 24 hours and cold drinks nicely chilled for up to120 hours – perfect for a lengthy road trip.

Compared to some of the others listed, Stanley seems to be more targeted toward hikers and camping trips than the morning commuter. Due to its large size, it can be a little unwieldy to carry around despite the handles.

If you are looking for a highly durable and hard-wearing Thermos vacuum flask, the “Stanley” should be at the top of your list – oh, and did I mention it comes with a lifetime guarantee!

What We Love

  • Comes with a leak-resistant lid.
  • Completely rust-proof.
  • Keeps coffee hot for 24 hours and iced for 120 hours.
  • A wide-mouth helps with easy pouring into the lid which also doubles as a cup.

Take Note

  • Larger models are big and unwieldy.
  • Dated design.

Contigo Vacuum Insulated Stainless Steel Travel Mug

Contigo Vacuum Insulated Stainless Steel Travel Mug


A thermos for coffee doesn’t always have to be large, and even a smaller travel mug can keep your coffee piping hot for extended periods.

This is where the Contigo excels, keeping your coffee hot for up to 5 hours. It’s not as impressive as the above Stanley or Thermos with their 24-hour heat retention guarantee, but this is a great budget option for a quick morning commute in the car.

An innovative feature of the Contigo is the “autoseal” lid that automatically seals between sips to prevent unwanted spills and leaks.

It features an auto-lock on the lid that prevents the autoseal button from being pushed accidentally while on the move.

It’s these features that make the Contigo A good choice for the car or the gym.

What We Love

  • Completely spill and leakproof.
  • Easy one-handed drinking design.
  • Easy to dismantle for top-shelf dishwasher cleaning.

Take Note

  • No obvious faults or cons.

Hydro Flask Wide Mouth Coffee Flask

Hydro Flask Wide Mouth Coffee Flask


The Hydro Flask metal water vacuum bottle is a must-have for people who drink beverages all day long. Not only are they the perfect accessory for your outdoor activities, but they also come in many different colors and styles.

Hydro Flask’s Coffee Flask is double-walled and vacuum insulated, which means the contents inside continue to be hot after hours of sitting on a desk.

Not only does it sport a BPA-free plastic lid, but it also has available lids compatible with Hydro Flask’s Wide Mouth series that can fit cups from 8oz down to just 5oz.

The Hydro Flask comes with a Hydro Flip lid as standard, but there’s a large selection of other caps that offer a range of convenience features, like the Straw Lid or the Flex Cap.

The double-walled construction means that the outside never feels hot to the touch, and with cold beverages, you don’t have to worry about condensation building up on the outside of the flask.

The Hydro Flask is rated to keep your coffee hot for about six hours or your iced beverage cold for up to 24.

What We Love

  • Compact design: Good for commuters.
  • A wide range of different caps can be purchased.
  • Mug and flask available in 3 popular sizes.

Take Note

  • Thermal insulation is not as good as some competitors.

 Best Coffee Thermos Hiking  Soulhand Travel Coffee Mug With Grinder

Soulhand Travel Coffee Mug With Grinder


Our final recommendation is something a little different. It’s not a coffee flask per se but a complete brewing flask with a built-in grinder.

It’s perfect for someone who wants to grind, brew and drink their coffee all in one coffee mug.

The Soulhand travel mug has a 200mAh lithium battery inside that uses a standard USB interface for charging. It takes about 180 minutes to charge fully, and you can expect to grind continuously up to 8 times.

That doesn’t sound like a lot, but it’s enough to keep you fully caffeinated throughout the day when you’re out in the wilderness.

The grinding mechanism features a set of ceramic conical burrs that can be easily adjusted for any requirements, but they work best for the pour-over grind, not so much for finer espresso or Turkish grind.

soulhand usb electric 5 in 1 travel coffee grinder

The innovative feature of this thermos mug is the mini pour-over filter. Once you’ve ground your whole beans with the built-in grinder, you then use the filter cone to pour your hot water over your freshly ground coffee directly into your heat-insulating mug.

You need to see it in action to believe it – check it out here.

What We Love

  • Includes an insulated mug, adjustable grinder, and filter cone.
  • Multifunctional use.
  • Stainless steel construction.
  • Built-in USB chargeable lithium battery for the grinder.

Take Note

  • Only brews enough for one person.
  • It can’t grind when the battery has no charge.

Best-Thermos coffee flask

How To Choose The Best Coffee Thermos

Not all coffee thermoses are equal. You’ll find that there is a considerable variation in both quality and price when choosing a Thermos.

If you want your Thermos to last through the daily barrage of knocking, commuting on public transport, and thorough cleaning, you’ll want peace of mind that the Thermos you have chosen is up for the job.

A poorly constructed one will struggle to keep your coffee at the right temperature for long periods, or worse, you could find it leaking everywhere in your bag.

There are many different thermoses on the market, and some are better suited for coffee rather than, say, soup. To help you choose the right one, we have put together things you should look for in any thermos or travel coffee mug.

Does Size Matter?

When choosing the best Thermos for coffee, you’ll quickly discover that there are many different sizes to choose from, with sizes starting at small 16-ounce thermos mugs up to larger 40 plus ounce flasks that can caffeinate a small army.

As you’ve probably guessed. The size of the coffee thermos depends on what you will be using your flask for the most. Are you drinking just for one, or are you sharing with others?

Even if you’re not sharing, I would recommend buying a coffee Thermos that can hold more than one cup, and a 16-ounce is an ideal size for the average person.

A good thermos will keep your coffee hot for a working day. So with a slightly larger flask, you’ll be content knowing that you’ll have enough hot coffee to get you through that slow Monday in the office.

Thermos Construction

Most of the best thermos flasks are manufactured from double-walled stainless steel or sometimes plastic.

Stainless steel is going to be the better option. It will resist corrosion and does not retain odors, and stainless steel can be used with a cold drink and hot beverages.

Plus, it’s durable, so it’s the best choice to hold up against the daily barrage of commuting to and fro from work.

Vacuum Insulation Is A Must

If your flask doesn’t keep your coffee hot, then it’s pretty much useless.

Insulation is a must when choosing a thermos for coffee. Luckily most of the better flasks feature vacuum-sealed double-walled vacuum insulation.

To put this into layman’s terms for the non-techies.

The air is sandwiched between the outer walls of the thermos flask. When sealed, the vacuum created will remove air from in between the walls, which will help eliminate any temperature change – It keeps the hot in and the cold out.

Cup And Lip

Good thermoses will have a specially designed lid that also doubles up as a cup.

You will also find that the pouring lip will vary from Thermos to Thermos. Some feature a simple screw cap, while others will feature a twist and pour design that allows you to pour without removing the stopper.

It’s essential to keep in mind that any Thermos, not just for coffee, should come entirely apart for thorough cleaning – especially the pouring spout and cap sections to avoid the accumulation of bacteria and old residue.

If the Thermos can’t be easily broken down into its different parts, such as the rings, stopper, spout, and lid, we recommend that you look for one that can.

Is Having A Handle Useful?

Depending on the Thermos size, a handle can be beneficial. The larger the size, the harder it will be to hold firmly.

Remember that a handle will make it a bit more challenging to slip snugly inside your backpack, so if you intend to take your coffee flask with you to work, a handle might not be as crucial as sitting around a campfire with cold, numb fingers.

With that being said, some Thermoses do feature a removable handle, providing you with the best of both worlds.


? What Is The Best Coffee Thermos For Work?

Any of our thermos recommendations are suitable for work. But ultimately, which is the best for you depends on how much coffee you drink and how long you need to keep it hot.

? How Long Does A Thermos Keep Coffee Hot?

The best coffee thermos will be able to keep your beverage hot for up to 24 hours. The cheaper budget flasks can only retain heat for around 12 hours. When buying a Thermos, the saying “you get what you pay for” rings true.

Our advice would be to spend a little more and get a far more superior thermos that will last a lifetime in most cases.

? How Do You Get The Smell Out Of A Coffee Thermos?

Removing the smell from a Thermos isn’t difficult with a simple solution of vinegar and water. Add an inch of vinegar to the Thermos and then fill with hot water. Screw the lid tight and shake vigorously and let it stand for 30 minutes. After 30 minutes have passed, empty the solution, rinse well and allow to dry.

? Can You Put Coffee With Milk In A Thermos?

It’s perfectly ok to keep coffee with milk inside of a Thermos. Just ensure that the beverage stays above 140ºF (60ºC). Once the beverage drops below this temperature, bacteria can start to grow to harmful levels. So ideally, you need to drink within 2 hours.

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Why Should You Trust Us
Mark has over 20 years of experience in the catering and hospitality sector. He takes his years of knowledge and expertise and applies it to critiquing coffee equipment and brewing gear.

Since the creation of the Bean Ground coffee blog in 2014, Mark and a small circle of coffee hobbyists have rigorously tested, reviewed, and researched coffee gear. In most cases, they have purchased the items themselves with the sole intention of rating and evaluating.

In that time, they have built up a list of quality points to look for and what makes specific equipment better than others. They cut through the noise and marketing hype that often surrounds products to give you their unbiased opinions so you can make clear decisions on your next purchase.

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