Our most popular shaker/water-bottle hybrid is now available in durable, odor-resistant stainless steel. With a design that's as elegant as it is rugged, the single-wall stainless-steel SportMixer is perfect for the gym, the outdoors, or on the go. Premium 18/8 stainless steel. Single-wall (non-insulated). Convenient SportLoop for easy carrying. StayOpen flip cap won't close on your nose. Rubberized SportGrip offers a firm grip. Ounce and milliliter markings indented in bottle. Large drink/pour spout. Easy to clean - dishwasher safe.BPA-free.