Last updated: August 11, 2021

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Welcome to our big thermo mug test 2022. Here we present all the thermo mugs we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the web.

We would like to make your purchase decision easier and help you find the best thermo mug for you.

You will also find answers to frequently asked questions in our guide. If available, we also offer interesting test videos. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy a thermo mug.

The Best Thermos Mug: Our Picks

Guide: Questions you should ask yourself before buying a thermo mug

Why do you need a thermo mug?

In a thermo mug you can keep a small amount of your drink warm or cold and easily take it with you on the go, for example if you have kept it in a thermos flask for a longer period of time.

This way, you can enjoy your favourite drink at the right temperature in an environmentally friendly and affordable way.

If you are one of those people who commute to work every day or are simply on the road a lot, you have certainly bought a coffee to go at some point.

However, this is not only expensive in the long run, the coffee in the paper cup is also so hot at first that you can easily burn your tongue, but only a short time later it is too cold again. On top of that, the lid is often not tight and the coffee spills out if you tip it over.

The thermo mug has solutions for all these problems and is also environmentally friendly! The more often it is used, the more it pays to invest in an insulating, leak-proof mug.

What material are thermo cups made of?

Thermal mugs are made of different materials. Each material has different advantages and disadvantages. Which material is best for you also depends on what you want to use your thermal mug for.

Commonly used materials are

  • Stainless steel
  • Glass
  • Plastic
  • Ceramic

Thermal mugs made of double-walled stainless steel can insulate drinks for a long time. In addition, stainless steel is robust and therefore ideal for on the go, where the mug can easily fall down. That is why many, especially high-quality insulated mugs are made of stainless steel.

If the mug is used more at home, glass is a good alternative because glass is a tasteless material. In addition, these thermal mugs look very nice and you can see the drink through the mug.

Plastic thermo mugs are often available at very low prices and are therefore a good entry-level product. You should make sure that these cups are free of harmful substances.

Ceramic thermal mugs not only look good, but are also easy to clean in the dishwasher. The different materials are often combined, for example a stainless steel mug with a plastic jacket.


Thermal mugs are made of different materials, for example stainless steel, plastic, glass or ceramic.

How much does a thermo mug cost?

There are thermal mugs for every budget: the price range goes from less than 10 euros to 40 euros. Factors that influence the price are the material, the design and the brand.

How long do thermal mugs stay hot or cold?

The material and the lid are decisive for the insulation time of mugs.

The insulation time can vary greatly from one mug to the next. A thermal mug made of double-walled stainless steel with a tight seal can keep hot drinks warm for up to 6 hours and cold drinks cool for up to 12 hours.

But here too, it is important to consider what you need the mug for and how long the insulation period should be.

If you are only travelling a short distance, it is more important that the mug is easy to open. For this, the insulation time can be a little less long.


Depending on the quality of the material and the closure of the thermal cup, drinks are kept warm or cold for different lengths of time. Before buying, you should think about what you want to use the mug for, how long you want it to insulate and at what temperature you will use it. Source:

Which thermal mug for which purpose?

Before buying, think about what you want to use your thermal mug for. Depending on the task, the mug should be able to fulfil different requirements.

Purpose Criteria
Short way to work etc. Usability, short insulation time is enough, tightness
Long trip/car ride Leak-proof, long insulation time
At home Nice design
At the office Serious design

The thermo mug for on the go should definitely be 100 % leak-proof and leak-proof. At home or in the office, this is not quite as important - here the design should rather match the surroundings.

Can I also keep food warm or cold in a thermo mug?

An alternative use of the thermo cup is to keep food at the desired temperature: It doesn't just have to be drinks, you can also enjoy a hot broth in winter or an ice cream in summer.

A wide opening on the thermo mug helps to get to the food easily. It also makes it easy to clean the mug after use.

Decision: What types of thermo mugs are there and which one is right for you?

Basically, you can distinguish between three types of thermo mugs:

  • Thermos mug with large opening
  • Thermos mug with small opening
  • Thermos mug with automatic opening

In addition to thermos flasks, there are also practical thermo mugs from which you can quickly and conveniently enjoy a hot or cold drink. When buying a thermo mug, you should be able to roughly circumnavigate your individual area of use in order to find the perfect mug for you.

In addition to capacity, density, material and appearance, you should pay particular attention to the opening for drinking, as these have a decisive influence on your enjoyment factor and practical handling.

You can find out how to find the right thermo mug for your needs using the above criteria.

How does a thermo mug with a large opening work and what are its advantages and disadvantages?

A thermo mug with a large drinking opening offers the advantage that it is easy to handle and can be used in a versatile and practical way in everyday life.

You can drink from a large opening in a similar way to open containers. The mug is particularly suitable for the big thirst in the morning, as it is easy and quick to drink from.

  • Practical handling
  • Easy and quick drinking
  • Stirring the drink
  • Can spill over quickly
  • Drink cools down faster

Furthermore, a large drinking opening is practical for subsequently adding more liquid, sugar for coffee or stirring and mixing the drink. For this purpose, the entire lid does not always have to be removed and there is little risk of spillage.

Nevertheless, it can happen that unfavourable movements cause the drink to spill through the large opening and you might spill something all over yourself.

If the lid remains open, the contents may cool down more quickly, as the heat can escape more quickly over a larger surface area.

How does a thermal mug with a small opening work and what are its advantages and disadvantages?

A thermal mug with a small opening for drinking can be handled very easily and safely. The small opening makes it easy to drink even when you are on the go or walking, as the drink cannot spill out.

This is very practical, as it makes it easier to drink on the go, even in stressful situations.

In addition, small or targeted and measured sips are possible because the opening of the cup does not let much liquid through. This also means that you rarely burn your tongue, or only to a very small extent, as you only get a little liquid in the first sip.

Safe handling and easy drinking are therefore no problem.

  • Prevents spillage
  • Targeted and measured drinking
  • Heat is retained longer
  • Safe handling
  • Only small sips possible
  • No rapid cooling

On the other hand, the small opening of the drinking cup means that only small sips are possible. This makes drinking slower. Moreover, additional ingredients cannot be added to the cup afterwards because the opening is not large enough for precise addition.

To do this, the lid always has to be unscrewed. This creates the additional danger of spilling. In addition, a very hot drink cools down to drinking temperature only very slowly when the lid is open.

How does a thermo cup with automatic opening work and what are its advantages and disadvantages?

A thermo cup with an automatic opening and closing by, for example, pressing a small button on the lid while drinking is a very practical solution. This prevents the contents from spilling out unintentionally.

In addition, the automatic opening makes it easy to drink in a targeted and easy-to-dose manner. Another advantage is the longer heat retention, as the openings are usually not very large.

Since the cup can be closed again immediately after use, the hot drink cannot cool down so quickly.

All in all, this type of thermo mug offers very safe handling and practical use without having to worry about the mug leaking by closing the lid.

Nevertheless, there are also some disadvantages with this thermo mug. The opening for drinking is usually not very large, so it is difficult to add additional ingredients or drinks to the cup afterwards.

  • Prevents spillage
  • Targeted and measured drinking
  • Heat is retained longer
  • Safe handling
  • Only small sips possible
  • No rapid cooling

In addition, both the button to open the hole in the lid would have to be pressed and the new contents poured in at the same time, which is impractical handling for this case. For this reason, the entire upper part of the cup usually has to be removed for this case.

If the drink is still very hot and you want to let it cool down a little before drinking it, the whole lid has to be removed, because pressing the button permanently to open the drinking hole would be exhausting. The removed lid also creates a high risk of spillage again.

Buying criteria: You can compare and evaluate thermo mugs based on these factors

In the following paragraphs we explain which factors you should look for when buying a thermo mug. This way you can quickly decide whether a thermo mug is suitable for you.

The most important factors are:

  • Size
  • Design
  • Lid / drinking opening
  • Cleaning


Thermal mugs come in many different capacities, from small (300 millilitres) to large (700 millilitres).

You should decide on the size of the mug depending on the main use. For example, on the way to work, a small mug with 300 millilitres will be enough, which is equivalent to a large cup of coffee.


Thermal mugs come in all kinds of colours and shapes.

From classic to brightly coloured, everything is available and, as we all know, there is no accounting for taste. The material of the mug also has a big influence on how the mug looks.

Stainless steel looks classic, glass noble, coloured plastic modern and ceramic minimalist or playful depending on the print.

you can buy


thermo mugs in many different shapes and colours, from classic to fancy. Source:

Lid / drinking opening

The connection between the lid and the mug is important for the seal.

Often the lid is either put on the cup or turned. Lids that are screwed on are usually tighter and therefore more leak-proof. Lids made of silicone can easily wear out, as this is a very flexible material.

Besides the usability, you should also pay attention to whether the lid can be cleaned easily. More complex lids or drinking closures can also be more prone to wear.

There are also different designs for the drinking opening: Simple models only have a flap that closes the drinking opening. Other cups have more sophisticated openings that can be opened and closed at the touch of a button.


Most thermal mugs are easy and simple to clean by hand. Some mugs are even dishwasher-safe, in which case cleaning is even easier.

Facts worth knowing about the topic of thermo mugs

How does my drink stay hot or cold longer in a thermo cup?

The thermo mug insulates longer if you do not pour the desired drink directly into the mug. First rinse the mug with cool (warm) water before filling it with the cold (hot) drink.

This allows you to bring the insulated mug to the desired temperature and gives it a longer insulation time.

Can I have coffee to go filled into my mug?

Coffee or other drinks to go is a pleasant routine for many people - unfortunately, it creates around 100,000 tonnes of waste every year in Germany alone.

Many coffee vendors now allow you to have your coffee filled directly into the thermo mug you brought with you. Some vendors even offer a small discount.

Make sure your cup is rinsed and visually clean. It is up to each coffee vendor to decide whether or not to fill the coffee into a mug that they have brought with them, as they bear the risk of liability for any health problems caused by contamination.

After a bit of googling on the internet, you will certainly find an overview of suppliers where this is possible. Or you can simply ask at your local shop.

Image source: / Annie Spratt