Patented BlenderBall wire wisk inside (electropolished 316 surgical-grade stainless steel) * Made of durable Eastman Tritan copolyester won"t absorb flavors or odors * BPA free, Phthalate free, and dishwasher safe * Convenient sport loop makes it easy to carry anywhere * Stylish rubberized grip, leakproof design, and once and milliliter markings for easy measuring * BPA and Phthalate free like all BlenderBottleproducts. * Convenient sport loop to take it anywhere * Dishwasher safe * Made of tough, odor-resistant eastman tritan * Patented blenderball wire whisk ball inside