Sakura's line of Soufflé pens are the epitome of niche. Nobody recognizes the need for a product of this kind much less knows these pens even exist.
Being able to write directly on glass glass products allows people to make their point faster. It takes out unnecessary layers of communication tactics.
Solve the problems of two classic fairytales by writing the answers directly on each iconic glass object. Plots Shmots. Let's get to the point, already.