Poincare hyperbolic disk coasters

IKEA sells cheap glass coasters, perfect to etch into gorgeous mathematical coasters. These are the ones I have etched so far.

Lakes of Wada

A while back, me and three friends at Stanford bought a square inch of Detroit together, and divided it up according to the Lakes of Wada configuration.

With access to the TechShop laser cutters, I cut out the third stage of the construction from four different acrylics, and put together one of these tokens for each of us.