Instruct: Classify the given review into positive or negative sentiment.
Query: Not a good product

Okay it might depend on your child. I have tried for weeks to get my son to take these cups. I've tried both valve and removing the valve and all he does is scream at the cups and throw them on the ground.Someone mentioned Nuby brand sippy cups to me and I got some of them. My son took to them the first try and hasn't had a problem yet with them.