This is the best dice stacking cup on earth. It took a while to get the exact shape I was looking for but we've come up with a design that is easy to stack with, can stack up to 6 dice, and still has a nice wide mouth, enhancing the impossibility of stacking.

We make padded suede bags which are a perfect place to keep these cups stored. Check out that item below.
There is only 1 of these left. It's a darker wood with no rings. There are beautiful highlights on the cup made with copper. Truly 1 of a kind. Will try to get pix up. Inquire if you want to see pix sooner than that.