That reminds me of my extremely frugal mom - when I was a kid, she asked my dad if he could somehow get (read “steal”) a big box of plastic cups for home use. He worked for a soft drinks company and they had a warehouse full of stuff like that, for county fairs and sporting events.
Her rationale was that she was getting worn out and spending too much time washing dishes for 8-10 people, no dishwasher back then, and the cups would really help, because she could just pitch them, single-use style (hey, it was the ‘70’s).
Easy enough to do, so Dad would brought home a giant box of thousands of plastic cups, maybe 8-10 ounce in size.
Did it help lessen the load on Mom? Of course not, because she looked at those cups and immediately thought, “Them’s good cups…too good to throw out. I can wash ‘em and use ‘em again. Waste not want not…” - and that’s what she did. She just moved from washing regular drinking glasses to washing plastic cups.