St. Patrick's Day Rhinestone Shamrock Flask (7 oz). Keep your liquor cold and out of site with this comfortable 7 ounce flask. Each flask comes with an attached No-loss cap so you will never loose your cap. A flask is perfect for use in restaurants when you do not want to pay those high alcohol prices. Order a regular Coke and when the waiter goes away you can add a shot of your favorite alcohol beverage. Owning a flask means that it's party time anytime! This gorgeous flask features a shamrock and the entire flask is cover with beautiful large rhinestones!