Shaker Ball: Inside the bottle, you can see a metal wire whisk ball. This acts like a handheld blender to break up powder clumps when you shake the bottle.
Leak-Proof Lid: Features a secure, snap-shut flip cap to prevent liquid from spraying out while shaking vigorously.
Tapered Body: Typically includes measurement markings on the side to help you track your water or milk intake accurately.