I am looking to decorate one of those “Yeti” brand insulated coffee cups for my brother for Christmas, and I am not sure what to use so that the decoration does not wash off. I have researched a bit but have only found tips for porcelain mugs, and the surface of this cup is more like a lacquered enamel. I will tell him to hand wash but expect that he will want to occasionally use the dishwasher to clean it. Has anyone had any luck with decorating on this type of surface and having it hold up to a lot of touching and washing? If so, how did you do it? Thanks in advance!