I was a disappointed that as another reviewer had mentioned one of the cups leaked internally after one drop the first day. It's just too much of a hassle to return. The other one appears to be working so good so far. I sent my hubby out to store to buy add'l cups and he came back with the same brand - so I guess we'll try again. I also must note that they were only 7.49 at Target. But I guess we pay for the convience of shopping at home. With all that said - my son really liked the cup.