That guy is a Nalgene Ninja!Keep it full, empty it al the way or move slower when it is partially full. That's all I can think of. I knew a guy that keeps a 20 ounce mt dew in his cargo pocket. He uses that to gauge if he's moving to fast or not. If he hears it sloshing he's moving to fast.
Yes , there's a baffle made to fit the Nalgene bottles. I'm not home now where I have it bookmarked but I'll try to remember to link it later if someone doesn't do it before then.
This may be what Shrek is referring to:
new_silentwater » Page 3 of 7