Start with plain glasses of your choice.
Wipe the glasses down with rubbing alcohol and let dry.
Wrap the entire glass in the painters tape. Be sure to get out any air bubbles using a credit card and hard edge. The draw your pattern.
Use a razor or exacto knife to cut out the pattern, then peel it off.
Make sure to tape the top lip of the glass so it's safe to drink. Then spray with the gold enamel in even coats.
Once the paint is dry slow remove the tape.