Once again Spectrum Noir Markers have stood up to the test. I have made cups and mugs in the past with Paint and vinyl and now I can add Spectrum Noir Alcohol Markers to that list. I have to say I was pleasantly surprised, even after holding my breath when I was trying the last test which was washing with hot soapy water. I squealed like a little baby as my husband says, well are you going to try it in the dishwasher next? Ummmmm NOOOOOOO! But I might add I never put any of the cups or mugs I make in the dishwasher...lol.