The 12oz SIC Laser Engraved Tumbler is double-wall vacuum insulated for extreme temperature retention. The high-quality stainless steel along with an extra layer of copper insulation is designed to keep your favorite beverage ice cold up to 24 hours! The same technology that keeps your beverages ice cold also keeps your hot drinks hot for hours. It’s sweat proof and fits in most cup holders. All tumblers come standard with a splash proof lid that that helps maximize temperature retention. SIC provides a lifetime warranty on their products. The design is permanently laser etched in the tumbler’s durable powder coat finish. No flaking or peeling, it’s made to last.