My 2 yr old son just LOVES Elmo. So while at BRU, I picked up a 2 pk of them. I just knew he would be super excited to have a sippy cup with "melmo" on it. I washed them and put his milk in it. A few minutes later he comes back to me soaking wet. I looked and the insert had come out. I put it back in but it just kept falling back out. This happened with the other cup too. I called BRU and was able to return them for a refund. I wouldn't buy another cup. The inserts are a big part of a sippy cup and if they can't stay in, what's the point?