Hello "Reuleaux" - Shape of 2014

First, I would like to mention that the "Reuleaux" shape was shamelessly inspired by Paul's "Guitar Pick".

This is a rounded reuleaux triangle to be exact. It is a curve of a constant width and interestingly enough: it rolls.

It's symmetrical, not quite round, not quite angular.

It can be constructed with a hexagon and a circle, and it rolls inside of a square. It is the perfect blend of the last three shapes.

Rebound of