I accidentally stumbled upon this granola-to-go cups and got him for his birthday. I'm very satisfied! So far, he has always kept tight. Only the ratio of milk to cereal I do not quite succeeded when both chambers, it is fully fills me far too little milk. But then you have to stop pour a little less cereal. When cooling the cooling unit in the freezer keeps these really long (4-5 hours) very cold! Sometimes even a bit too cold. The built-in spoon is a little fragile, but holding. Is usually only uncomfortable cleaning: Once you have cereal versepeist morning and carries the cup then the whole day even with him rum warms this course. The bacteria in the milk and see how really great and usually begin to reproduce itself, resulting in a truly open unanangehmen smell. If you have the chance you should use the cup so best used after briefly aussüplen with clean water so as not to have such a penetrating odor in the nose during cleaning.
The negative point but you can blame the cup barely. I would fall at least not as one might do better. Therefore full score for this great device!