1. PROTEIN – Made of quality, strong, durable, and unbreakable materials. The stainless steel protein shaker comes with 2 mixing balls to ensure smooth blending of all additives without lumps, for protein shakes, protein drinks, and preworkout beverages. 2. LEAKPROOF SHOCKRESISTANT – Features a secure, leakproof twist lid for an airtight seal, preventing spills. The lid won't burst open if dropped, eliminating accidental leaks and messes. If leakage occurs during use, simply tighten the cap. 3. SAY GOODBYE TO SMELLY PLASTIC BOTTLES – Traditional plastic shaker bottles retain odors and are hard to clean. Our metal shaker is made of quality, kitchengrade stainless steel that resists odors and stains, reduces plastic waste, and minimizes microplastic exposure. 4. INNOVATIVE SHAKER BALLS – The silicone mixing ball is quiet, efficient, noiseless, easy to clean, and durable. The plastic mixing ball blends quickly and effectively. Choose the right shaker ball for different occasions and needs—ensuring smooth, lump mixing of all additives.