Instruct: Classify a review into positive or negative sentiment.
Query: Not worth the time or the money!!!!

If I could rate this any lower then 1 star I would, when I was pregnant I did alot of research on many different bottles, I decided to go with these based on all the reviews even thow knew they took a long time to clean, I wanted the best for my baby, but my baby is very gassy and does not burp well. I don't think there worth the time or the money.