Tumblers have a hole at the bottom (closer to the side and not the middle) for inserting glitter and solution!! Seal hole when complete with UV Resin.
They are coated for sublimation but also work great with permanent vinyl.
For Sublimation: You MUST sublimate the tumbler BEFORE adding your glitter and solution.
Each glass tumbler is boxed with a bamboo lid and reusable plastic straw.