The wine bottle is made of food-grade stainless steel, 100% BPA-free, and will not leave a metallic taste or lingering smell. It is a non-toxic, anti-corrosion, and anti-rust product. You can safely use. Every hip flask is laser welded, air-pressured and quality control with a stainless steel cap. The cap is sealed tightly to ensure that vodka, whiskey or other favorite beverages will not leak out and be wasted. Put your favorite beverages (such as vodka, brandy, whiskey, bourbon, gin, tequila, rum or cognac) neatly in your pocket. Store it anytime, anywhere. Add your logo or message to customize. Orders of 10000 pieces or greater are eligible for sea shipping.