Review on 10Pcs Tumbler Shields: Keep Spray Paint, Epoxy Resin Out Of The Inside Of Cup For Cleaner Tumblers by Samuel Bowen

Started making tumblers recently. I like mixing techniques such as sublimation, air brushing, resin etc. I previously attempted to use masking tape to protect my tumblers, with limited success. It was always hard to get the tape on to form a consistent edge. And if I didn't make sure that the tape was pressed super secure, I would get leakage under the tape. Even with as careful as I was, I still ruined a couple of tumblers.This whole process took a lot of time. It was tedious and took the fun out of making tumblers. This protectors are a cinch to use. It takes seconds to get the in place. Nice tight consistent seal. Let's me skip right to the run. There are so many sizes, I can always find one that fits.I can't imagine trying to do tumblers without these.