Double-Wall Insulation Design: Strong ceramic construction with an inner and outer layer with air in between to slow down the transfer of heat from the liquids to outside. Keep warm longer than other normal single wall mugs. Hot in the mug & warm on your hands, right perfect insulating effect Coffee On the Go With Thicker Colorful Sleeve: Cup sleeve are made from silicone, durable and unbreakable, amazing feel for your hands and a totally cool grip; the beautiful and consistent colors between sleeve and lid perfectly light your days on your trip, travel or driving on the way, for the office and at home
