Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WE HATE THE BOTTLES/NIPPLES!!!

They leak every so much. The newborn nipple hole is too big. It pours out too fast for a newborn to take in, which means he was swallowing too much air. and that would make him gassy and collicky. I think half of every bottle was ending up on my baby and what he was able to take in, was half spit after burping. Don't waste your money.We have now switched to the Playtex Vent Air, and have happy and well nourished baby. :)