That's the way to go. I use the 5 oz paper Dixie(tm) cups for some stuff, and the 16 oz plastic Solo(tm) cups for other stuff.
Most of my stuff starts life in an egg carton.
Waste not/want not.
/johnny
I also use leftover sour cream, cottage cheese and yogurt containers if they’re the right shape. The ones that are smaller at the bottom work best. Also pudding cups and egg cartons too.
Waste not want not indeedy. I resuse them from year to year as long as they’ve still got structural integrity.
We got a bargain on 20 ounce Dixie-type cups at a remainders store. They have logos for a place that went out of business, so sold for about 50 cents a tube of 100 of them. They work great.
Good luck with that unknown potato. I love finding volunteers.