koudai or foot rings
In otemae or japanese tea ceremony the matcha chawan is inverted when dumping out waste water. this act of inverting the chawan creates the challenge of the host to hold the chawan without dropping the tea bowl. in terms of functionality, the ability to ‘hold’ onto the tea bowl while inverting is a challenge in itself, let alone have a challenging footring to grip.
try it for your self.
the most interesting footrings are handcut versus kezukuri (trimming the foot) on the wheel.
having balance between the do or body of the chawan and having the design of the ‘do’ or body meet the footring area.