Step 1. Squeeze a generous amount of paint into bottle and swirl to coat. Turn bottle upside down to let excess paint drip out. Clean the lip of the bottle with damp paper towel if needed.
Step 2. Clean outside surface of bottle with rubbing alcohol to prep for glass paint marker. Draw No. 9 on bottle. The glass markers are really easy to work with, so if you are artistic, you can make yours as elaborate as you want!