Nuby No-Spill Drinking Cup Review

The cup itself is fine, but the rubber sippy part doesn't last a week! It has 3 small slits in the top where they sip, and after a few uses, this eventually breaks apart. No more "No-Spill"! I haven't seen any replacement nipples in any stores. The only way to get them is by ordering them from the company itself (which unfortunatly doesnt take the discover card).  They should at least sell replacement nipples in the store, since I hate throwing the cup itself away when there is nothing wrong with it!