Okay, so different question now. I get it in fine, and I check to make sure that it's open by running a finger around it. However, a short time after I'm out of the bathroom, I suddenly feel almost like a punch to my insides. It's more startling then it is painful, and it usually occurs after sitting or laying down. I go to check it, and the cup is still open. Generally at least. Once it did leak a little, but then it stopped. So, that punching sensation, do you think it's the seal momentarily breaking, or is it just the cup popping open further?