Photo 1 of HydraPak Stow - Collapsible Backpacking Water Bottle (500ml) - BPA Free, Ultra Light, Spill-Proof Twist Cap - Mammoth Grey

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Photo 1 of HydraPak Stow - Collapsible Backpacking Water Bottle (500ml) - BPA Free, Ultra Light, Spill-Proof Twist Cap - Mammoth GreyPhoto 2 of HydraPak Stow - Collapsible Backpacking Water Bottle (500ml) - BPA Free, Ultra Light, Spill-Proof Twist Cap - Mammoth Grey