Kooyi Vacuum Insulated Sports Water Bottle 500 ML, Stainless Steel Flask Travel Mug with Built-in Straw - BPA Free Double Wall Vacuum Insulated Sports Water Bottle, 500ML, 17.5 oz, keeping liquids cold and warm up to 12 hours Premium 304 stainless steel interior and 201 exterior, BPA free; Durable and Healthy, Hygienic, No metallic odor Quick-Flip Press Button Lid with built-in humanized drinking straw, made in 100% Food Grade PC silicone material One-handed opening and drinking, easy to use and carry, it fits most auto cup holders. Perfect for Cycling or Hiking, Gym, School, Camping and Traveling 100% GUARANTEE LEAK PROOF. The high quality locking mechanism and drinking straw design ensure no leaks no matter how much you shake it