My old water bottle had cracked so I picked up a new one with a neat feature- a built in straw so you can just open the sipper thing and drink from it without tipping it back. Nice? No! Not nice. I filled up my water bottle at rough river, at 577’. Some time later on my way home I was cruising at 6,000’ and felt thirsty. I grabbed my spiffy new water bottle and popped up the little sippy thing. I was immediately blasted in the face with a geyser of water. It hit the ceiling. Had to fly home in wet pants. Bottle and crotch shots below.