Premium 500ml/750ml stainless steel protein shaker with vacuum insulation technology for temperature retention. High-grade 18/8 stainless steel interior resists odors and stains, while BPA-free Tritan lid ensures chemical-free mixing. Precision laser-cut threads create leakproof seal during intense workouts. Dual-design compartments store supplements separately with built-in stainless steel whisk ball for smooth consistency. Ergonomic non-slip grip and carabiner loop for gym bag attachment. Professional-grade powder dissolving performance for athletes, ideal for protein shakes, pre-workouts and electrolyte drinks during training sessions. Commercial kitchen-safe construction withstands industrial dishwashers. Bulk wholesale pricing available for fitness studios and supplement retailers.