This double walled coffee mug is made of food-grade stainless steel, the cup body with silicone grip. Spill proof travel coffee mug with screw in cup lid is equipped with a sealing ring, which provides a good leakproof effect. This travel mug is the perfect size for your morning coffee. Price listed is for 12 oz, welcome inquiries for more sizes(17 oz) we have. Orders of 5000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.