This is a coaster that lives in the craft room. I use it for normal coaster purposes (i.e. drinks), but also as a place to set a paint or glue bottle, a paintbrush, or other messy items. Affiliate links below.
This is one of two Frisbees that I use as paint palettes.
When it gets full, I don't wash it. I peel it. After the paint dries completely, it peels off in colorful chunks. It's extremely satisfying to see the pretty colors on the underside.
To make my coaster, I took an old plastic lid (off an oatmeal container) and filled it with a generous layer of Mod Podge Sparkle. I started arranging my paint bits in the Mod Podge.
This is how it looked when I'd filled it in completely. Well, almost completely. I wanted the sparkly Mod Podge to show between the paint pieces.
It took two full days to dry in a warm room before it was ready to use. I thought about adding a top coat of Mod Podge to seal it in and level the surface, but decided against it. The surface is almost perfectly level (good enough for my purposes) and I don't care if any drips of paint might get on the surface.
Look at all the sparkle!
I love a functional trash-to-treasure project. Mine lives in the craft room like I said, but it could just as easily solve a problem in a different room. It would make a good plant saucer, for example. You could set condiment bottles on it at a BBQ so that mustard doesn't drip on your table. Lots of possibilities!