Food Grade Material: The flask is made of premium stainless steel with no rough or sharp edges. Features a secure hinged screw lid to keep your drink safe. The men's flask is ergonomic and portable, just slip it into your back pocket or bag and go . You can take it everywhere and also for a long flight. Leakproof Flask: Each whiskey flask has a thick stainless steel lid, air pressure, laser welded and of quality control. The cap seals tightly to ensure that no vodka, whiskey, bourbon or other favorite drink will leak out and go to waste. Easy to clean: wash with warm soapy water, rinse and dry thoroughly. Do not store your wine in this flask for a long time and please drink your wine as soon as possible. Ideal Gift: The flasks were perfect for a long walk on a hot summer night, or when vacationing for a walk along the beach, then to sit and have a picnic with the onbe you like during the day, or have a little drink at night while watching the stars.