I know it stretches and stuff but I just drank like 42oz of water in around 15 minutes and don't feel full at all, and my mouth is still dry and thirsty. And sometimes you can drink like 3-5 cans of beer in 15 minutes or less no problem. If you look at how much space 42oz of water fills up I just can't fathom how all of that fits in my stomach...I guess it is one of the mysteries of life, like why is grass gree or why is the sky blue.