The SIC 30 oz. Tumbler is our largest tumbler size available. The SIC 30 Oz. Tumblers are ready to help you with your hydration! These tumblers were designed specifically to fit in all of your cup holders. Our triple insulated technology guarantees maximum temperature retention and our splash proof slide lid ensures your drink stays where it belongs. We only use the finest 18/8 kitchen grade stainless steel and premium powder coat materials for our tumblers along with Tritan plastic lids. Like all SIC products, our 30 Oz. tumblers are always backed by the SIC Lifetime warranty. (register your product at www.siccups.com).