Joybuy Insights

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

A travel mug may seem simple, but small differences determine whether you enjoy using it every day. A lid that does not close properly, a capacity that does not fit your coffee machine or a mug that can only be washed by hand can quickly turn into a poor purchase.

That is why, when buying a travel mug, insulated mug or reusable coffee cup, it is worth looking beyond colour and marketing claims. Pay particular attention to the insulation technology, capacity, closure and maintenance.

Common pitfalls when choosing a travel mug

1. ‘Insulated’ does not always mean it stays hot for hours

A double-walled mug reduces heat loss, but that does not tell you exactly how long your drink will stay hot or cold. A double-walled plastic mug works differently from a vacuum-insulated stainless-steel mug.

So check whether the product description states a specific heat-retention time. For example, the 275 ml Mepal Ellipse Travel Mug states that the drink stays hot for 30 minutes. That may be enough for a short train journey or coffee break, but less suitable for a long working day.

2. Leak-proof performance depends on the lid and correct use

A manufacturer may describe a travel mug as leak-proof, but the closure must be fully shut and the seal must be maintained properly. Check whether the lid can be removed, whether it has a silicone ring and whether the mug can be carried upright or also on its side in a bag.

Extra care is needed with hot drinks. Do not fill the mug beyond the stated maximum capacity and check that the lid is securely locked before setting off.

3. Maintenance is often underestimated

Not every travel mug is dishwasher-safe. Some models can go completely in the dishwasher, while others must only be washed by hand. Coffee residue and milk particles can remain around the seal if the lid cannot be taken apart.

A dishwasher-safe travel mug saves time, but always check exactly which parts are suitable for the dishwasher. The stainless-steel interior may be dishwasher-safe, for example, while the lid or vacuum insulation may not be.

Which specifications matter?

Insulation technology and material

For short journeys, a plastic double-walled mug is often lightweight and compact. According to the product information, the 275 ml Mepal Travel Mug Ellipse is made from plastic and silicone and fits beneath most coffee machines. The mug is compact enough for a bag and has a capacity suited to a smaller coffee.

For longer-lasting temperature retention, choose a travel mug with vacuum insulation instead. This creates an almost airless space between the walls, which limits heat transfer. The 375 ml Mepal Insulated Mug Ellipse has a stainless-steel body and vacuum insulation. According to the product information, the exterior stays cool and dry.

Also pay attention to how claims are presented. When a brand states a particular temperature-retention time, treat it as a product specification under the conditions selected by the brand. The actual duration depends on factors including the starting temperature, the amount of drink and how often you open the lid.

Capacity: 275, 350, 375 or 470 ml

The right capacity depends on your drinking habits and where you use the mug.

  • 275 ml travel mug: suitable for a small coffee, espresso with milk or a short journey.
  • 350 ml travel mug: a practical mid-size option for coffee to go, tea and cold drinks.
  • 375 ml travel mug: gives you a little extra room without becoming large.
  • 470 ml travel mug: useful for a long journey, a large coffee or several drinking occasions.

Also check the diameter and height. A mug that is 8.4 cm wide may not fit every bike holder or car cup holder. According to the product details, the 275 and 375 ml Mepal models have a diameter of 8.4 cm. The 350 and 470 ml Thermos models are narrower at the base, but differ in height.

Closure, drinking opening and cleaning

A good travel mug should be comfortable to drink from without you having to remove the entire lid each time. Look for a 360-degree drinking rim, a push button or a sliding closure. Also check whether the parts can be removed.

A reusable coffee cup for when you’re out and about helps reduce the use of disposable cups, but only if it fits your routine. If you carry the mug in a rucksack, choose a model with a closure that is described as leak-proof in the product information. For carrying by hand, a simpler drinking lid may be sufficient.

Recommended travel mugs by user profile

Suitable for: Budget-conscious beginners
Mepal Ellipse Travel Mug 275 ml Nordic Green

Mepal Ellipse Travel Mug - 275 ml, Nordic Green

Why it suits this profile: The compact capacity is suitable for a short commute, a small coffee or use beneath a coffee machine.

How this product avoids the pitfall

The product information states that it has a leak-proof closure and keeps hot drinks warm for 30 minutes. This makes it clear what the mug is designed for.

Key benefit & advantages

275 ml capacity, plastic and silicone construction, an 8.4 cm diameter and dishwasher-safe parts according to the product description.

Suitable for: Shoppers looking for premium quality
Mepal Insulated Mug Ellipse 375 ml Nordic Sage

Mepal Insulated Mug Ellipse - 375 ml, Nordic Sage

Why it suits this profile: The combination of stainless steel, vacuum insulation and a 375 ml capacity is well suited to everyday use at the office, on the go and at home.

How this product avoids the pitfall

The product description explicitly mentions vacuum insulation, a leak-proof closure and an exterior that stays cool and dry.

Key benefit & advantages

375 ml capacity, stainless-steel body, BPA-free according to the product information and dishwasher-safe.

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

Thermos SK Mug midnight blue polished 0,47 l

Why it suits this profile: The 470 ml capacity and robust metal construction are designed for longer days, car journeys and intensive use.

How this product avoids the pitfall

The product information states that it has a DrinkLock lid with a silicone seal. The mug is not dishwasher-safe, so it must be washed by hand.

Key benefit & advantages

470 ml capacity, double-walled stainless steel, a built-in hook for a tea bag and, according to the product information, keeps drinks hot for up to 7 hours and cold for 18 hours.

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.

How to use a travel mug without problems

  • For a hot drink, preheat the mug with hot water first. For a cold drink, chill it beforehand if necessary.
  • Never fill it beyond the maximum capacity, so the lid can close properly.
  • Check the silicone ring regularly for dirt, wear or deformation.
  • Do not use a metal travel mug in the microwave.
  • Only take carbonated or fermented drinks with you if the manufacturer explicitly permits this.
  • Allow the mug to dry completely after cleaning before closing it.

A 350 ml travel mug from Thermos may be worth considering if you are looking for a compact metal mug. According to the product information, the THERMOcaf TC Drinking Mug has vacuum insulation, a capacity of 350 ml, a dishwasher-safe lid and a weight of 281 grams. When buying, do check that the version you choose has the same features.

Frequently asked questions about travel mugs

How long does a travel mug last?

Its lifespan depends on the material, closure and maintenance. Stainless steel can generally withstand daily use, but a damaged seal may reduce its leak-proof performance. Replace the silicone ring or lid when it no longer closes properly. With normal use, a travel mug can last for several years, but always check for dents, cracks and leaks.

Can a travel mug go in the dishwasher?

This varies from model to model. According to the product information, the Mepal Ellipse Travel Mug and the Mepal Insulated Mug are dishwasher-safe. According to the product specifications, the 470 ml Thermos SK Mug is not suitable for the dishwasher and must be cleaned by hand. So do not look only at the material; check the care instructions for the complete mug and lid.

What does it cost to use a reusable coffee-to-go cup?

After purchase, the direct running costs are limited to water, washing-up liquid and, if applicable, electricity for the dishwasher. A reusable cup can also reduce the number of disposable cups you use when regularly buying coffee or tea on the go. The financial saving depends on how often you use the cup and whether a coffee shop offers a discount for using your own cup.