What unusual/uncommon item(s) do you always keep around for a perfectly logical reason?

https://sh.itjust.works/post/55535106

What unusual/uncommon item(s) do you always keep around for a perfectly logical reason? - sh.itjust.works

…or, looking for tips on stuff that are useful t9 have that most people don’t think about.

A handheld calculator and a slide rule. If the power goes out for a long time, I’ll still be doing math while the rest of you chumps will be using your fingers to count to 10.
Joke’s on you, I can get to 20 because I also use my toes!
Jokes on you, I can count to 21 all by myself. I still need to call my buddies for anything above that tho