What is your go-to souvenir to collect when traveling?

I've been taking pictures of elevator buttons for a few years now. My job gets me into a lot of elevators in a lot of different places. Idk why, it's just like a quick, easy, and weightless souvenir.

Fridge magnet

I like shot glasses because they are small, but for my wife it's coffee cups. We have about 50. I think my kids break them on purpose to make room in the cabinets. Can't blame them.

Postcard with stamps to send it back to our home

I have hangups about a cluttered house and neglected belongings. Kind of getting over it, but in the meantime I go for photos, as well as flat things such as postcards or prints from local artists that can fit on a scrapbook page :)

T-shirts! Granted I don't travel a ton, ton so they're not too numerous, but it's real nice to have them I think.

bottlecaps from local breweries

I did post cards and put them all on one wall but then moved and didn’t wanna put en all up again (have enough to cover an entire bedroom wall)

Local art

Rocks or shells

Coffee mugs, although I'm now regretting not collecting shot glasses like my wife.

Traveling?

Smashed pennies

I travel full time, so buying 'stuff' is just not something that's at all possible. Usually though, I'll buy a sticker and put it on my laptop or my water bottle. It's lightweight and carries a memory without taking up any space.

I like keychains.

Recipes

Pictures.

Take only pictures, leave only footprints.

My partner like refrigerator magnets though, so I've been picking those up every time I have to travel without them.