Rarely seals so it defeats the purpose

It is a good concept, expect it can be frustrating to get it to work correctly. I've had times that I put the top on 20 or so times and it would never seal, other times it may take a few. I bought 2 of them because I have 2 german shepherds and they drink a lot of water. I fill these twice a day so when it doesnt seal it gets very frustrating and you just end up saying screw it and it basically turns into a $50.00 standard dog bowl that you can get for a few bucks at a pet store.

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