Sip your morning brew as slowly as you want- this mug will keep things toasty.The Delta Insul-Mug features top-of-the-line thermal insulation from Sea to Summit. An integrated molded Polyurethane sleeve insulates the liquid inside the mug, unlike double-walled mugs which only protect your hands but don't keep your beverages hot or cold. Excess liquid flows back into the sipping hole because of the concave design of the lid.DetailsUltra-durable food grade Nylon 66 is dishwasher safeHard wearing, stain resistantWill withstand high heat and cold, won't crackPatent-pending Protex hex pattern baseBPA freeColor: Titanium GrayPlease note that Delta products should not be used in a microwave