Do not use spray paint on glass cups. Yes, it looks smooth. Yes, it’s tempting. But spray paint is designed for cars and fences, not for something that will hold your iced tea. It chips off in jagged pieces that you might accidentally swallow. Same goes for nail polish. Please, for the love of all that is holy, do not use nail polish. It contains toxic solvents that leach into beverages. I’m not your mom, but I am your conscience.
And finally, if you see a “glass paint” kit at the dollar store? Walk away. It’s likely just clear glue mixed with food coloring. It’s a sticky nightmare that will trap bacteria. Your glass cup deserves better. You deserve better.
The Verdict (With a Side of Sass)
So, what paint should you use on glass cups? Glass enamel paint. Specifically, the kind that says “dishwasher safe” on the bottle and comes with a baking instruction. If you want a pen, get a Posca and accept it’s hand-wash only. If you want to be lazy, accept your art will wash off. That’s the deal. No shortcuts.
Now go paint a cup. But maybe don’t gift it until you’ve tested it on your own coffee mug first. I learned that one the hard way, too. Trust me, your friendships will survive a slightly crooked star pattern. They might not survive a second paint-peeling incident.
