This 330ml color changing sublimation mug features a special heat-sensitive coating that reveals hidden designs when hot liquid is poured inside. Available in black, blue, and red coating options, with black being the most popular, these mugs are a favorite for DIY printing businesses and promotional product suppliers. We offer these mugs blank and ready for sublimation, allowing you to add your own logo, artwork, or personalized message. Perfect for custom gifts, promotional giveaways, and creative retail products.