What has not yet succeeded to me over coffee 100%, went here easily by hand.
Finding a really DENSE cup.
I have all started as an attempt, since nowhere was really reviews to find mugs and am very pleasantly surprised.
In the lower cup fits exactly a standard yogurt cups (eg Almighurt), the gasket clings to it, which is to remain in it. Tight. The upper lid is clipped, but keeps quite well.
Only, the foldable spoon is really shaky, I use reasonable teaspoon out of the office.
The cooling down cup is poured out double and with gel, keeping it cool for several hours. I see more as a nice feature to the next refrigerator, because the day does not stop that. But can easily be in the freezer compartment bring to temperature and cools down but not so, for example, would freeze the yogurt alsdass.
Conclusion: We have 2 - and they are actively in use.
Strong buy recommendation.