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Amazon.com: HydraPak UltraFlask Speed 500ml - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500 ml/17 oz),Malibu Blue : Everything Else
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Amazon.com: FITLY Soft Flask - 5 oz (150 ml) - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous
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