[math-fun] Trying to recall funny shape

I recently read of an odd solid shape, with I think an odd name, that has recently been defined. It may be this: Take a solid cylinder whose diameter equals its height, cut it in half along a square, rotate one half 90 degrees, and glue the halves back together again. Does this shape have a name, or is there something similar that does? Apparently it has very interesting rolling behavior. --Dan ________________________________________________________________________________________ "Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read." --Groucho Marx