Fill your container with warm to hot water. Make sure to fill it enough so you will be able to easily dip your mug.
Add drops of nail polish.
Swirl water with a toothpick. Work very quickly.
Dip mug partially in. If you are drinking from this mug you do not want nail polish where your mouth woul go.
Flip over and let dry.
Use a small foam brush and Dishwasher Safe Mod Podge to coat where nail polish desings are.
Let dry and enjoy your new mug.
Video
Notes
Dishwasher-safe Mod Podge needs 28 days to cure to fully work.
Do not place these mugs in the microwave.
For best results, we would still handwash the mugs.
Work quickly: The nail polish will start to get goopy if you don't dip it right away. Having your supplies ready and open will also help the process go smoothly.
Swirl your cup: You can get some cool designs if you swirl your cup to get the nail polish to overlap.
Use a toothpick to help clean out old nail polish. You can reuse the same container as long as you clean out the "nail" polish film.
Have fun with color: This turn out well with one color or be adventurous and try two. Just make sure you work quickly.