Concave Hexasphericon V1

A Hexasphericon is a geometry that based from Sphericon, a curious solid that formed by cutting a Bicone in half and rotate the one half by 90 degrees, Sphericons have fixed center of mass that makes them able to roll smothly despites the unusual path. A Hexasphericon can be created by cutting a hexagonal rotary geometry in half, rotating the one half by 60 degrees, and then connecting the two pieces. This is a concave version of a Hexasphericon.