You can never have too many coffee mugs, so here’s an idea on how to turn a boring coffee mug into a work of art. This DIY watercolor coffee mug is so simple to make, but the results are amazing! They also make awesome gifts and you won’t have to empty your pockets to brighten someone’s day. A cheap mug and some nail polish in your favorite color is all you need to create interesting designs to ornate the mug. I won’t even explain it further, just watch and then get to work!