I bought one of these for my son on a recommendation I read on MN thread. It arrived today and I cannot understand it at all. I have put water in it and tried drinking from it while pressing the button, presuming that us what you are supposed to do. The water just goes all over including out of the sides, beyond my lips, and I ended up with wet patches all over my shirt, if it had been hot coffee it would have been a disaster. Am I doing something wrong? I am packing it up right now to send it back as it is terrible, have I made some sort of mistake?