A coffee mug that changes with heat. Sounds like fun :) Magical Coffee Mug super cheap mugs from the dollar store to create gifts or party favors. Just draw on the surface of your mug and bake it for 30 minutes at 350 degrees
Writing coffee with the "coffee cup stains" is nice. The original stain that makes the "C" was probably enlarged to create the "f", overlaid to create the "e". The nice brown color that remind us of real coffee stain.