Instruct: Classify Amazon reviews into positive or negative sentiment
Query: LEAKS LEAKS LEAKS!

I should have know better because I had problems with Avent's baby bottles leaking fluid out the side of the lid. I read some other reviews and thought I'd give the training cups a try thinking they would be different. I was wrong. I discovered one of my son's cups that he had while playing and it was on its side with almost all the liquid on the carpet. The cap was screwed on so tightly that I almost couldn't get it opened so it wasn't user error. I will never recommend this product to anyone.