If you've worked with vinyl before, you know that it can be a tricky mistress. If you manage to do everything just right, it can come out looking fabulous, but mugs throw a wrench in the mix because you're going to obviously wash them and want to know your vinyl is dishwasher safe. So, what type of vinyl to use on mugs? If you're curious about whether you should be using a mugs heat-press, adhesive vinyl, or something else completely, I'll tell you what works best. Picking out the best vinyl for mugs I'll be completely honest, most of my…