Cold coffee? The thermo mug test from "saldo" knows what to do
7.2.2025
Translation: machine translated
The thermo mug should keep drinks hot while remaining leakproof. It would be nice if it didn't burn you in the process. In a test, "saldo" now shows which models are particularly hot - either positively or negatively.
On my early morning commute to work, I order my first coffee of the day from the store of a royal pretzel chain at the train station. To go, of course. In the interests of sustainability, I should actually bring my own cup for the black liquid gold, I think to myself every time. Until I throw the empty cardboard cup with the plastic lid into the train's rubbish bin just before I get off, as I always do, and my lofty thoughts about sustainability go with it.
The thermo cup test from "saldo" comes at just the right time. Thanks to it, maybe I'll manage to get my own reusable one after all. We'll see.
The test is hot
The test was carried out at the PZT laboratory in Wilhelmshaven on the North Sea. Experts there analysed ten thermo mugs according to various test criteria, which were weighted differently:
- Warmth retention (50 per cent)
- Safety (15 per cent)
- Robustness (15 per cent)
- Handling (15 per cent)
- Sensory (5 per cent)
Taking all the test results into account, each thermo mug was given a final overall score on the Swiss grading scale, ranging from "Very good" to "Poor".
"Good" thermo mugs
With a score of 5.4, the thermo mug from Ikea just missed out on a "very good" rating by a tenth of a grade. But it won the test. The "Undersöka" owes this to its heat retention capacity, by far the best in the comparison. "saldo" rewards this with an even 6, the only top score in the entire test.
The thermo mug from Kambukka follows in second place. Apart from its ability to keep warm (4.9), it scored better than the test winner in all other test criteria, giving it an overall score of 5.2.
According to the experts, the models from Migros and Emsa are also "good". You won't find the Emsa thermo mug from the test here, but you will find the next largest one, which was "Kassensturz" test winner a few years ago. Just saying.
"Sufficient" to "Poor"
The thermal mugs from Starbucks and Sigg have to make do with a 4.5 and an overall rating of "Sufficient". There's a good reason why the Sigg model didn't make it any higher: the risk of burns in the drinking area.
The laboratory measured 63 degrees in the drinking area of the Sigg cup ten minutes after filling, as "saldo" writes. And according to Zurich University Hospital, skin and tissue cells can be damaged at temperatures as low as 45 degrees.
The drinking area of the Coop cup was even hotter. Because it also proved to be not leak-proof when tested, it inevitably carries the red lantern with the only "bad" rating.
The models from Nespresso, Bodum and 24 Bottles are the next three "unsatisfactory" models. They failed the robustness test, specifically the drop test. According to "saldo", the experts were unable to close them after the test due to damaged lids. The thermo mug from 24 Bottles was also the only one to receive a score of 1.5: The laboratory found rust in it after the tests. And I always thought it was about the roasted flavour ...
Water bottles + Thermos flasks
CHF27.90
24 Bottles Thermo mug Travel Tumbler 0.35 l Little Buds
0.35 l
*You can find the entire thermo mug test from "saldo" for a fee here.
Header image: Galaxus
I'm a full-blooded dad and husband, part-time nerd and chicken farmer, cat tamer and animal lover. I would like to know everything and yet I know nothing. I know even less, but I learn something new every day. What I am good at is dealing with words, spoken and written. And I get to prove that here.
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