Joybuy Insights

Buying a travel mug: how to choose a leakproof cup for when you’re out and about

A travel mug may seem straightforward, but small differences determine how convenient it is to use every day. A lid that does not close properly, a capacity that does not suit your coffee machine or a mug that is difficult to clean can quickly make your purchase less practical.

So do not focus only on colour and shape. Pay particular attention to capacity, insulation, closure, choice of material and cleaning. Below, you can read which features matter and which models suit different situations.

Common pitfalls when choosing a travel mug

1. “Leakproof” without clear information about the closure

The term leakproof only tells you something when it is clear how the lid closes and whether the claim applies when carrying the mug. For example, a drinking opening without a lock may be less suitable for a full bag.

Therefore, check:

  • Whether the lid closes completely.
  • Whether there is a silicone ring or other seal.
  • Whether the manufacturer states that the mug is suitable for carrying in a bag.
  • Whether the drinking opening can be locked.

With every model, it is still sensible to tighten or close the lid properly and carry the mug upright if you are unsure.

2. A large capacity that does not suit your routine

A 350 ml travel mug is suitable for a regular coffee or tea. A 375 ml model offers a little more room, while a 470 ml or 900 ml mug is better suited to long working days, car journeys or outdoor activities.

A larger mug is not automatically more practical. It may be heavier, take up more space and not fit beneath every coffee machine. Consider how much you drink each day and how much room is available in your bag or cup holder.

3. Confusing insulation with an ordinary coffee mug

A ceramic coffee mug is mainly intended for use on a table. A double-walled mug reduces heat transfer to the outside, but not every double-walled mug uses vacuum insulation.

Pay attention to the difference between:

  • Double-walled plastic: often lightweight and compact, suitable for short journeys.
  • Double-walled stainless steel: sturdier and suitable for hot and cold drinks.
  • Vacuum-insulated stainless steel: designed to retain the temperature for longer.
  • Single-walled glass or ceramic: mainly suitable for use at home or in the office.

According to the manufacturer’s product description, the Mepal Insulated Mug uses vacuum insulation. The Mepal Travel Mug uses double-walled plastic. These are different constructions with different weights and intended uses.

Which specifications should you check?

Capacity and dimensions

A 275 ml mug is compact for an espresso, small coffee or short train journey. If you want a more generous portion, consider 350 ml, 375 ml or 470 ml. A 900 ml model is more of a large tumbler for extended use than a standard travel coffee mug.

Also check the diameter and height. A mug with a diameter of approximately 7.5 to 8.4 cm may fit in many cup holders, but always check this with your car, rucksack or coffee machine.

Material: stainless steel, plastic, ceramic or glass

A stainless steel travel mug is generally suitable for everyday transport because stainless steel is less likely to break than glass or ceramic. With a stainless steel model, check whether it has a double-walled construction and whether the lid consists of several parts.

Plastic can offer a lower weight. According to the product information, the Mepal Travel Mug weighs 170 grams and has a capacity of 275 ml. This makes it an appealing option for students or commuters looking for a compact travel mug.

Ceramic and glass are better suited to a fixed location, such as a desk, kitchen or café. A ceramic mug is not the same as an insulated mug and usually does not have a leakproof lid for transport.

Cleaning and maintenance

A travel mug that is difficult to take apart is more likely to retain residue around the seal. Check whether the lid can be removed and whether separate parts can be cleaned individually.

Pay attention to the instructions:

  • According to the product information, the Mepal Insulated Mug and Mepal Travel Mug are dishwasher-safe.
  • According to the product information, the Thermos SK Mug is not considered suitable for the dishwasher and must be washed by hand.
  • According to the description, the Maxcook tumbler can be fully dismantled, but is not suitable for the dishwasher, microwave or steriliser.
  • Do not use wire wool or harsh abrasive cleaners on stainless steel or sealing rings.

Extra care is still needed with hot drinks. According to the safety information, drinks can remain hot for a long time. Test the temperature before drinking and do not fill a mug beyond the stated maximum capacity.

Recommended travel mugs for different usage profiles

Suitable for: Budget-conscious beginners
Mepal Travel Mug Ellipse 275 ml Vivid Blue

Mepal Travel Mug Ellipse - 275 ml, Vivid Blue

Why it suits this profile: This compact travel coffee mug is lightweight, has a capacity of 275 ml and, according to the product description, fits beneath most coffee machines.

How this product avoids the pitfall

The capacity and dimensions are clearly stated. According to the product information, the lid is described as leakproof and the mug is dishwasher-safe.

Main benefit & advantages

Double-walled plastic, 170 grams, BPA-free according to the product description and dishwasher-safe.

Suitable for: Shoppers looking for premium quality
THERMOS TC Drinking Mug stainless steel 350 ml

THERMOS TC Drinking Mug St. Steel Matt 0.35l

Why it suits this profile: The double-walled vacuum construction in stainless steel and the 350 ml size are ideal for commuters, students and office workers looking for an insulated mug for everyday use.

How this product avoids the pitfall

The product information states that it has a lockable, leakproof construction and provides precise dimensions: 16.7 cm high and 7.5 cm in diameter.

Main benefit & advantages

350 ml capacity, stainless steel with vacuum insulation, removable lid and a weight of 281 grams.

Suitable for: Specific uses & intensive users
Thermos SK Mug 470 ml midnight blue

Thermos SK Mug midnight blue polished 0.47l

Why it suits this profile: The 470 ml stainless steel mug is designed for intensive use in the car, office and outdoors, among other settings. The built-in tea-bag hook is practical for tea drinkers.

How this product avoids the pitfall

The product information states that it has a DrinkLock lid with a silicone seal. However, bear in mind that it must be hand-washed: this model is not listed as dishwasher-safe.

Main benefit & advantages

470 ml capacity, double-walled stainless steel, DrinkLock lid and an integrated hook for tea or a filter.

Suitable for: Everyday coffee at the office
Mepal Insulated Mug Ellipse 375 ml Vivid Mauve

Mepal Insulated Mug Ellipse - 375 ml, Vivid Mauve

Why it suits this profile: This 375 ml travel mug offers more space than a small travel mug and, according to the product description, is suitable for hot and cold drinks when you are out and about.

How this product avoids the pitfall

According to the product information, the mug has vacuum insulation, a leakproof closure and a dishwasher-safe design. The maximum capacity of 375 ml is clearly stated.

Main benefit & advantages

375 ml capacity, stainless steel interior, BPA-free according to the product description, 300 grams and dishwasher-safe.

Looking for more options?

We have put together a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about travel mugs

How do you clean a travel mug properly?

Separate the lid and silicone ring if this is possible according to the instructions. Rinse all parts with warm water and mild washing-up liquid after use. Pay particular attention to the drinking opening and seal. Do not use a scouring pad or wire wool on stainless steel. Always follow the manufacturer’s care instructions, as not every mug is dishwasher-safe.

How long does a travel mug last?

Its lifespan depends on the material, closure and how it is used. Stainless steel is less prone to breakage than ceramic or glass, but a lid and silicone ring can wear out over time. Replace a seal when it is damaged or no longer fits properly. Do not drop the mug or use it in the microwave. Products are also covered by at least the statutory two-year guarantee under European consumer rules; additional rights may apply under the relevant national legislation.

Which travel mug is practical for coffee in the car?

Choose a model whose diameter fits your cup holder. A capacity of 275 to 375 ml is usually practical for a standard coffee break. Also check the height, closure and drinking method. A compact leakproof mug with a securely closing lid makes more sense for the car than a large 900 ml tumbler.