Why are you encouraging people to use a clumsy, pointlessly inaccurate measuring method? Volumetric measures for cooking are insanely stupid, particularly for dry and/or solid ingredients. Try selling these poor people a decent digital kitchen scale instead. Most of them don’t cook anyway, so you’re not going to lose any customers.
The two must-have tools for decent cooking: digital kitchen scale and digital temperature probe (and perhaps a digital temperature gun, so you don’t have to touch anything, but then those things aren’t terribly accurate).