The ThermoFlask 2Pk Insulated Coffee Mug set includes a 16oz and 12oz tumbler in black with blue accents. These vacuum-flask style mugs are made of stainless steel and aluminum, ensuring they can keep your beverages hot for up to 6 hours and cold for the same amount of time. The slide lock lid makes it easy to sip on the go, and the solid color pattern adds a sleek touch. The mugs are perfect for both hot and cold drinks, making them versatile for any beverage preference. Made by the trusted brand ThermoFlask, these insulated tumblers are a must-have for anyone looking to enjoy their favorite drinks on the move.