This is one of my absolute favorite craft projects and perfect for the gift recipient with a great sense of humor! I used "Google Images" to look up pictures of mustaches for inspiration. Using a black, ceramic marker, I drew and colored a different type of mustache at the top of each mug. After I was satisfied with my masterpieces, I set my oven to 275 degrees and placed the mugs into the oven for 45 minutes to set the marker and avoid smudging. I will not say who the recipient of this gift could potentially be, but I will say that they are in for a very good time once they receive them!