As far as consumables go, a little letterpress ink goes an awfully long way: I’m still working off the black ink pot I purchased more than a decade ago, and at this rate it will last another decade.
But it was time to broaden my horizons beyond black, red, and yellow, so I ordered up a set of 15 tiny pots from StudioMeowy in Bristol. Seven days later and here it is!
Purple! Silver! Gold! Fluorescent pink! Both opaque and transparent white! Blue!