Well, my daughter loved this cup when she was in the market for a sippy cup. She was breastfed and could also drink from a traditional sippy cup, but, missed nursing. This was good for the transition. I agree that the kids bite pieces off of the mouth piece after a few uses. Also, it tears easily when cleaning. The cup we bought came with a lid but the lid wouldn't stay on the cup. I did not buy another one once I had to throw it away. We got the disposable Take 'n toss cups.
Deep Water, WV