The BlenderBottle Classic 400ML Shaker Cup makes it easy to maintain proper nutrition and hydration on-the-go. Featuring a patented mixing system—with a 316 surgical-grade stainless steel BlenderBall wire whisk (found only in BlenderBottle brand shaker cups) that moves freely inside the bottle to smooth out drink mixes and meal ingredients—it’s ideal for protein shakes, smoothies, fiber drinks, and meal replacements. It’s also a handy kitchen tool for mixing pancake batter, scrambled eggs,