Zak Designs 0052-S861-AMZ HydraTrak Insulated Water Bottles, 22oz, Berry SS Elastic bands easily track fluid consumption - wear them as bracelets or roll them up the tumbler with each refill. Double-wall vacuum insulation keeps drinks cold for 23 hours. Patented screw-on lid design fits tightly to prevent leaks and includes integrated soft touch carry ring. Smooth drinking edge with threads on inside. 22-ounce bottle made of durable, BPA-free stainless steel. Fits in most car cup holders. Hand washing is recommended, do not microwave.