OUTAD BPA-Free Camping Hiking Travel Mug/Cup Set, 14.2 + 11.2 Fluid Ounce Material: BPA-free Tritan Copolyester(cup); Polypropylene(cup lid). 2 in 1 double layer design with a spill resistant lid for convenient drinking. Nesting design: The inner cup is a 14.2 fl.oz(420ml) and outer cup is a 11.2 fl.oz(330ml). Can hold both cold and hot liquids. Weighs only 5.1 oz, perfect for traveling, camping, hiking, backpacking and daily drinking.