This uniquely styled 20 oz tumbler maintains the temperature of your hot and cold drinks white offering s solid and quality construction. the beveled design is sure to grab your attention. The Zeus is made above industry standards with these following features: 1.#304 food grade stainless steel construction 2.vacuum insulation 3.Copper plated inner wall 4.Seamless structure on side and bottom of inner wall 5.Hot 8 hours 6.Cold 16 hours