The FLET Iced Drink Tumbler keeps your beverages refreshingly cold. This stainless steel mug comes with a frozen stainless steel stick that goes inside to take your drink to an iced cold level. All you have to do is place the stick in your freezer to charge for four to eight hours. Then, it’s ready to go inside the FLET and keep your drink cold for up to 24 hours. If you prefer a hot drink, this tumbler can keep..