Clean the mug with rubbing alcohol or window cleaner.
Cut the photocopy to fit the mug. Apply a coat of Mod Podge photo transfer to the front of the photo. Apply the photo to the mug and gently smooth out the photo. Allow the medium to cure for 24 hrs.
Use a damp sponge and gently start rubbing off the paper backing. You may have to repeat this process a few times.
Once all the paper is removed and the photo is dry, apply a coat of dishwasher safe Mod Podge to the top of the picture. Make sure you seal the edges.
Allow the mug to air-dry for 21 days in order to cure completely.
