This single 20oz flask is great to help you save over $100 each time you use it on drinks. Take it to the pool, sports game, festival, beach, cruise, amusement park or anywhere you can bring in coolers. It is made of food safe plastic and is more opaque and holds 50% more alcohol than all other ice box flasks. Just fill up and screw on the lid. For best results put it in the freezer to get it ice cold before you put it in your cooler to keep things cold longer. Buy 2 for twice the fun!