The Frosty Mug keeps beverages icy cold without diluting them. Whether your beverage is beer, lemonade, cola, squash or anything else, the frosty mug is the only mug to use. The Frosty Mug is made from plastic, and sealed inside the plastic is a liquid. Simply put the frosty mug in the freezer until the liquid has frozen, and enjoy a cool refreshing drink each and every time.