SIC- Seriously Ice Cold 20 ounce tumblers are powder coated at the factory not after market like the previous leading seller's tumblers are done. SIC offers a lifetime guarantee on these tumblers. This information is provided in the packaging of the tumbler and is a guarantee that would be handled by the SIC company and not Monograms Markings and More. These tumblers are guaranteed 24 hours cold and 8-10 hours hot liquid. You will LOVE the colors. Add a monogram and make it your's!