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
