The Contigo Handled AutoSeal 16oz Mug provides users an auto-sealing travel mug with a one-handed drinking operation. Drink from either side of the mug by pushing the button on the handle. The dual sided drink interface allows you to use whichever hand you prefer. The mug seals automatically after every sip – and with the added sliding lock feature, you can toss it in your bag without having to worry about spills. The double walled, vacuum insulated, stainless steel body keeps beverages hot for 5 hrs and cold for 15 hrs. To clean – push on the tab under the lid to drop down the sealing mechanism and access the drink seals. The lid is dishwasher safe, so cleaning hard to reach areas is a breeze!