Use it to freeze, so far everything fits perfectly. The size is just right, because my little one still can not eat proper portions. The cover is by freezing not arched or so. I do not feed the paps but from the cups directly, because they can not be in too hot water to warm up (always bring the water to a boil and then place a white porcelain cup with porridge in the freshly boiled water so that the temperature probably because were not suitable for the plastic of the cups, because they may not cook).