High-Quality Stainless Steel: Durable, BPA-free metal shaker bottle designed for gym use. Double-Wall Insulation: Keeps protein shakes or hydration drinks at the ideal temperature for longer. Leak-Proof & Easy to Clean: Anti-leak silicone seal with twist-threaded lid for mess-free use and hassle-free cleaning. Ample 735ml Capacity: Perfect for extended gym sessions or daily hydration needs. Eco-Friendly & Accurate: Reduces plastic waste, with embossed internal volume markers for precise filling.