Granted this isn’t a really awesome design, but it’s a gift for my dad. It fits his personality to a “T”. Designing mugs (or any oven-safe item) with sharpie markers is so easy! Just find a design-less mug and have at it with your favorite color marker or markers. Then, throw it in the oven at 350 F for 30 minutes. The heat will “set” the design, so it won’t come off. It’s so much fun. I mean, I get to let my creative side loose! I’m making a bunch to give as Christmas gifts!