OK, these are my standard tree mugs now...with the celtic cross thumb bob, and three colors of glaze and a stained and waxed (unglazed) tree shape on each side. They still have the slope which allows stacking or using in a car cup holder.
I've been so pleased that these go home and become parts of other people's lives. I like using them, but I refrain from it. If I ever get enough made for there to be "what's called inventory" in the merchandising of business, then I'll probably have a set for me to enjoy too! For now, I get to look at them and enjoy my fun design.