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Product info

Say hello to the insulated Sports Cap, designed to fit standard-mouth Hydro Flask bottles. Made from BPA-free plastic, this cap eliminates that annoying whistling sound other caps create.  Keeps your drink colder even longer Unique internal valve eliminates whistling sounds Easy to drink from and allows for 1-handed open and close Designed to fit 12, 18, 21 and 24 fl. oz. standard-mouth Hydro Flask bottles Made from BPA-free polypropylene #5 Material: Polypropylene Dimensions: 2.7 x 2.7 inches Weight: 1.4 ounces

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