Rapid Thermal Discoloration: This plank changes color when exposed to temperatures above 40C, then returns to its color as the temperature rises.BRIGHT COLORS AND Glossy Finish: This permanent adhesive vinyl comes in 3 different colors. Vinyl planks have a smooth surface and bright colors, sure to be perfect for your DIY or personalized gifts!Waterproof and Durable: Heat-activated color-changing vinyl is permanently waterproof. Strong adhesion perfect for cups, glassware, tumblers and moreWide range of applications: Unleash your potential with vinyl. Perfect for DIYs, water bottles, tumblers, and more! Enrich your gift-giving game with personalized items that are easy to weed and transfer.Colour:gradient colorMaterial:vinylSize:30 x 25cmPackage Contents:3 x color changing vinylOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.