"The overal idea of this cup is good and we couldnt wait for our order to arrive. However, we were very dissapointed at the closing mechanism of this cup. The cup doesnt at all close properly and its not easy for an adult to hold and drink withourt spilling not to mention a young child. We have ordered a number of these cups and at the moment we are not using not even one. I am so upset as my son asks for a brobee cup but I just dont feel like giving it to him as I know that the water as well as the parts of the cup are going to go everywhere :-(("