Does graphite wash away in the dishwasher? I may finally find out the answer to that, because I know I’m not going to be trying to erase my to-do list as I work my way through my day. At least not any list I write on this Write-On Glassware Mug. I have spilled way too much hot coffee over the years to go trying any fancy tricks when it comes to drinking my morning brew. Best to leave my note-making skills confined to flat, horizontal surfaces.