DIY Sharpie Mugs

After I found out about sharpie mugs and did research on the best way to make sure the sharpie didn't come off I will not make every mug I have unique. I used oil based sharpie and heated it in the oven for 425 F for 30 minutes. One thing to remember is to put it in the oven before it heats up so the mug heats up with the oven. And after the 30 minutes leave it in to cool down with the oven.