Flat Edge Sublimation Tumblers: This sublimation tumbler has a flat edge and completely straight body, and the surface is sprayed with high-quality sublimation coating, which can transfer patterns more clearly and brightly. Keeps Hot and Cold: Our sublimation tumblers are made of high-quality food-grade stainless steel, double-layer vacuum insulation, so that your drink can maintain a constant temperature for a long time, and you can use this cup in any season. Two Ways to Sublimate: If you choose heat press machine to sublimate your tumblers, set temperature at 330 for 50 seconds and rotate to the other side for 50 seconds . If you use oven, set emperature to 330 for 5-6 minutes. Individually Boxed: The 20 oz sublimation tumbler blanks are individually boxed. Also, we have provided extra accessories: 50 * sublimation paper, 4 * Heat Resistant Tape , 50 * rubber bottoms, 50 * straws and 50 * straw brushes.