There's such an elegant solution here: cups could have individually tailored patterns (or chosen from a large library of a few 100s) on the outside s.t. you wou

There's such an elegant solution here: cups could have individually tailored patterns (or chosen from a large library of a few 100s) on the outside s.t. you wouldn't confuse yours for another. We're (at least I am) pretty good at memorizing combinations of odd shapes and colors, so there's no need to name cups (i.e. they can be pre-named).