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20-ounce capacity (note: measurements only go to 12 ounces) shaker cup for mixing protein shakes ... found only in BlenderBottle brand shaker bottles Screw-on lid creates leak-proof seal, and ...

Lid and seal Nothing’s worse than opening your gym bag to find that your protein shake has leaked everywhere. Look for a bottle with a tight, screw-on lid that snaps or locks shut to prevent spills.

Loading up on protein shakes after workout session is an essential element ... Good-looking and even better value, the Promixx Shaker Bottle is designed to last you a lifetime.

Its 700ml capacity makes it ideal for mixing protein shakes and other supplements. With a leak-proof design and high-quality material, this shaker bottle is a must-have for any fitness enthusiast.

I used this protein primarily as a post-workout drink but also tested it post ... no matter how much you shake them with a blender bottle, still end up chalky, chunky, and just downright unappealing.