Blenderbottle brand shaker cups are used by the world’s best athletes for a reason-they work. Our mixing system uses the blender ball wire whisk to deliver remarkably smooth protein, nutrition, and meal replacement shakes anytime, anywhere. Simply add your ingredients, drop in the blender ball whisk, and shake. The blender ball whisk whips around inside the bottle, mixing even the thickest drinks to a smooth and light consistency. Made of 316 surgical-grade stainless steel, the blender ball wire whisk is designed to remain in the bottle until you’ve enjoyed the contents. Just drinking water feel free to leave the blender ball wire whisk inside-it’ll never rust, chip, or peel. Featuring a leak-proof guarantee, premium materials, and unbeatable mixing, the blenderbottle classic shaker cup will always show our standard of reaching for perfection. Perfect for protein shakes, smoothies, fibre drinks, meal replacements.