DId a bunch of this today. Instead of the bleach pen (which I always get wonky results with because I can't control the amount of gel that comes out) I used a tiny paint brush and a cup of bleach. Great control - love the results!! WIN!!
Use acrylic paint & the back end of a paint brush for the dots. Then put into a cold oven & preheat to 350 - let sit for 30 minutes. Turn off oven & let cool with the glasses still inside. Voila! Hand-painted works of art you can drink from