Freshly laundered and ironed handkerchiefs.

Eric and I are the only people I know who use handkerchiefs. Old-fashioned, and a bit of work (that laundering and ironing) but so much better than any alternatives. I hope there are enough handkerchief-users in the world that someone will find it worthwhile to keep producing them, even when the generations before me (who I assume make up most of the market) gradually leave the market.