Choosing a tumbler made with thicker glass, such as Starbucks tumblers, can help prevent any potential cracking or chipping when drilling. Select a size and shape that works best for you! A traditional tumbler shape or a mason jar in a 16, 24, or 32 oz size works great for this craft.

You might hear a slight popping sound once you drill through the bottom. If you don’t want to drill, use a hot-fix tool to make the hole. Use a 7 mm, concave attachment and gently press the heated tool into the bottom of your tumbler. Hold your tumbler to the side to see when the hot tool enters the gap. [3] X Research source

Remove any stubborn pieces with a pair of tweezers. When using a hot-fix tool, the plastic hole might not come off all in one piece. If that’s the case with you, simply reheat the hole with the tool and pull out the plastic with a pair of tweezers. [5] X Research source

Plug the hole with your finger and flip over the tumbler to see how much glitter you’ve added. It’s best to have an even dispersion of glitter in your tumbler. While chunky glitter is recommended, experiment with other glitter sizes! A fine, medium, and chunky glitter mix will give you a lot of dimension and sparkle.

Different amounts of glue and water will give you a different look, so play around your ratios! Add more glue for your glitter to fall more slowly, or more water for more glitter movement. Vegetable glycerin is a less thick substitute for glue that gives you more movement in your tumbler.

Along with tapping the tumbler, plug up the hole with your finger and shake your tumbler to mix the glitter and glue mixture together.

Alternatively, use a fast acting, 5 minute epoxy in place of UV resin. Just mix together the epoxy separately, if required, then pour it into the hole. Then let it cure for 5 minutes. [14] X Research source

For an extra sparkly touch, add some of your glitter to the resin! Just make sure to even out the glitter so no pieces are poking through the resin. After curing, add another layer of resin and cure it to make sure the bottom is super smooth.