Silicone Tumblers: The silicone sleeve is specially designed for 15 and 20 oz skinny straight blanks and measures approximately 8.66 x 8.26 inches. It can perfectly wrap and fix the straight mug during the sublimation process, preventing the design from being misplaced and deformed. Improved Design: You don't have to worry about the silicone strips of the sublimation tumblers melting or sticking to the white glass liner during the heating process, ruining your design and creating unnecessary waste. Convenient to Use: The silicone sublimation tumblers are very simple to use. Even beginners can learn quickly. You don't have to worry about burning your hands, you don't have to wait for the tumbler to cool down in bulk, and you can get a good cup. Material: The are comfortable to use and protect your hands. The still maintains strong adhesion at high temperatures. The Wrap Silicone Sleeve Kit is both great helpers for sublimation and any high temperature project. The sublimation kit