Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Wonderful replacement nipples

Being the cheapskate that I am, tried extending the nipples of my daughter's Avent system by puncturing additional holes. This worked for a few weeks but the additional punctures extended the hole so bad that it was not able to control the flow of milk. Come this wonderful replacement. The price is cheaper than in other stores and the holes stay on its own. The baby sure loves it. No more worries.