Add heat or cold and watch it transform! Cricut Temperature-Activated, Color-Changing Permanent Vinyl changes color when exposed to hot or cold temperatures, making it perfect for personalizing mugs, glassware, and more.* This sampler includes 3 heat-activated sheets and 2 cold-activated sheets to help bring your most vibrant ideas to life. All Cricut materials are optimized for Cricut cutting machines with automatic cut settings in Design Space to ensure you have the best cutting experience.