I mean some games , ya might need one.  Product features - Stainless steel construction ensures durability and rust resistance. - Keeps beverages hot for 6 hours and cold for 12 hours—perfect for any season. - Customizable full wrap decoration for a personal touch with logos or photos. - Seamless vacuum-insulated design for temperature retention and no condensation. - Comes with a BPA-free lid featuring a slide closure for easy sipping. Care instructions - Hand wash only