Fits Multiple Vessels: These lids only fit threaded Simple Modern vessels, including all sizes of the Classic, Scout, and Journey as well as the 24oz Trek. They do not fit any size of the Simple Modern Voyager, Cruiser or Slim Cruiser; the 16oz collegiate pint; the 30oz, 40oz or 50oz Trek Tumbler; or any other brand of drinkware. Dishwasher Safe: Clean in the top rack of your dishwasher. Leak & Splash Proof: The clear flip lid and insulated flip lid are leak-proof when closed. The insulated straw lid twists onto the tumbler for a splash proof barrier.Insulated: This lid's double-wall insulation ensures your drink will stay at its ideal temperature for longer.