Product Features: Durable & Leak Proof:The Sweat-proof water bottle is equipped with BPA-free silicone rubber on each lid, creating a leakproof seal. Perfect for hiking, biking, boating, the gym, work, school, and home. The bottle is safe in backpacks, beach bags, or the edge of your countertop. Premium Stainless Steel: Stainless Steel Workout Water Bottle is made from premium high grade stainless steel, which is 100% BPA free and non-toxic, never leave a metal taste, durable and long-lasting. The outside layer is anti-slip for easy grip. Double Walled: Double-walled and vacuum-sealed to make sure you experience zero condensation, keep beverages cold for 24 hours, and hot for up to 12 hours, making it the perfect sports or commuting bottle. The sweat-proof design keeps your fingers dry. Stylish Design Smooth clean body lines. Fashion and cute. Perfect for school, office and outdoor travel. Capacity: 350ml/500ml/600lml/750ml/1L or customized.