Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Avent Needs to Develop a New Spout

I loved my Avent cups...at first! They were the first sippy cups we tried when my child was 5 months old because we loved the Avent bottles. My child is now 21 months old and we have used several other brands of sippy cups. The Avent brand is my least favorite! There are so many parts and they are difficult to clean. Fluids get trapped in difficult places and they become disgusting! The soft spouts also become stained easily. The only positive points to these cups are that they don't spill easily, are interchangeable with the Avent bottles, are clear, and the handles can be moved to different potitions in relationship to the spout. But, please don't waste your money. I'm throwing all my Avent cups out because I dislike them so much! Buy Playtex or Gerber and save yourself the hassle!