The Perka® Charlton 14 oz. Tumbler / Jar has a double wall vacuum insulated construction that keeps your hot liquids hot for 12 hours and cold liquids cold for 24 hours. The tumbler can double as a food jar and the screw-on lid comes with a holder for securing the included food-grade stainless steel spoon. It also has a molded cork base to protect desktops from scratches while providing an earthy look.