Idea is super, implementation Well

When I saw that there is a bottle-thermal protection, I really thought myself happy and: Something So there is! Immediately ordered, which sold out the size of the wide-mouth bottles and initially was not available. So we tested the size of the high narrow bottles. And how good that we first tested: The bottle can be good and have a good chat with the shell, but it was honestly so. I did not feel that the milk remains significantly warm longer than without protection - never in my life this envelope keeps the bottle half an hour warm, that is absolute nonsense.
I would not buy it again. Theroretisch it would probably do a foil around the bottle as well. Too bad, because the idea is really great!