Instruct: Classify Amazon reviews into positive or negative sentiment
Query: really love this bottle

I am a working-nursing mother, so when I am gone in the day my baby gets these bottles and has no problems going back and forth from me to the bottle. The only trick is not to change from the newborn nipples. When we did try to go a step up to the 2 nipples, it came out too easily and our baby didn't want to work for the food when it came time to nurse her.