@elena @kiwiWolle for a while, I used SD cards as my go-to thing to fill up orders to the "free shipping" minimum order.
Ordering something for fifty bucks where 59 bucks gets you free shipping? I'll just throw two SD-Cards in the mix.
Someone mentions "MITMproxy"? great, pop in a new SD-Card! How about Pi-Hole? Yeah, got a few spares, just go for it :-D
I basically tape micro-SD-Cards to a sticky note and note down what's on it, or passwords, or whatever I think is most useful.