looks like more than a gallon is dangerous....
http://yarchive.net/med/overdrink_water.html
haha, thats EXACTLY the page i was looking at... this guy is crazy.. 5 gallons is alot
I think you are safe:
I didn't see this page but, I just thought it could be dangerous. Won't you get sick or run out of room?
there's always that.
Your stomach stretches. It's not dangerous.