These tumbler clamps are specially designed to fit most 20 oz straight or tapered sublimation tumblers. They are made of high-quality ABS plastic, which is lightweight, durable, and easy to use. They have a non-slip silicone pad on the bottom that prevents scratching and sliding of your tumbler. With these tumbler clamps, you can easily and securely hold your sublimation tumblers. You can also use them to wrap your tumblers with sublimation paper or shrink wrap film. They are ideal for making DIY tumbler crafts, gifts, or promotional items.