What average (or somewhat obscure) things did you see in real life and decided to put into your worldbuilding?

I am working on a world for my ttrpg game and I have been using everyday things and incorporating them as average as possible into the world. For example, dental hygiene; my players are using the same toothpaste, toothbrushes, flosses, and mouthwashes that exist today (just resting in a fantasy setting).<br><br>Let’s discuss your favorite examples!