Tumbler PVC Stand

My wife does these resin tumblers/cups as a hobby. She uses the stand to spray paint the tumblers while upright and then to hold them while the resin cures. The process uses a machine that spins the tumblers, then as they spin you add colored resin to make it smooth as glass as it spins. This stand uses a piece of PVC pipe inserted to hold the tumblers or cups at different times during the process.