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

These bottles were a "first time mom" nightmare. The nipple did not form a seal around my childs mouth and formula leaked out. She would then cry out of hunger. It was a never ending battle. (Until I purchased a Playtex product that solved all my problems) I also contacted the Avent Company and shared how unhappy I was and they told me in no uncertain terms that it wasn't their problem and refused to help me! I will never buy another Avent product.