MSYU 10 Pack Sublimation Tumblers Bulk, 20 OZ Stainless Steel Double Wall Skinny Straight Tumblers Blank, Subbing Tumblers Cups with Sublimation Paper, Straw and Individually Box10 Pack Straight 20oz Sublimation Tumblers: Absolutely straight, same circumference between top and bottom,and also the tumbler is ready with a polymer coating for Dye sublimation prints using heat press or convection oven. so it can allow you design your cups with your perssonal picture, which can be special gift for your friends or anybody you care. Two Way to Sublimate Your Tumbler: If you choose heat press machine to sublimate your