40 oz Tumbler With Handle and Straw Lid Insulated's size is 40oz. Keep your drink icy cold or super hot all day long with this jumbo ultra popular travel mug! Made of 18/8 stainless steel with a polypropylene plastic liner, this mug features a 40 oz. capacity, a clear spin lock lid with straw that guards against spills and splashes and a narrow and tall design that fits most cup holders. Hand wash only. Choose from an assortment of mug colors. A one color, one location imprint is included.