Nalgene's Flask gives you an "outdoorsy" alternative to those heavy, clunky, stainless steel flasks your father used.

PET Flask with polycarbonate sleeve provides durable, lightweight protection and insulation

Nalgene valve-seal offers secure leakproof storage for 12 ounces of the refreshing beverage of your choice

Cap doubles as a shot glass when in polite company

BPA free