Sublimation tumblers that change color in the sunlight, and charge to glow at in the dark! Made with special poly coating to use with heated mug press or with convection oven. Make custom designs that won't peel or crack like epoxy or vinyl. A true sublimation tumbler ready with a polymer coating for sublimation prints using heat press or convection oven. Stainless Steel Tumbler blank, with clear lid and plastic straw. Made from double-walled non-leaching and non-toxic stainless steel. 100% BPA and Phthalate Free. **Please note: Gold is Coral Color, and Grey is Sky Blue. Variations in colors are possible due to the manufacturing process.