middle-aged IT generalist guy, United States. from left, lens cleaning cloth, REI 1L nalgene, handkerchief, coffee tumbler, ridge wallet, generic grid lined notebook, Leatherman Signal, Pilot G2 .07 pen, keys for work with included tiny flashlight, and phone case (Peak Design Mobile) to represent the phone (Pixel 7 Pro) used to take the photo.
not pictured: car/bike keys, as the wife has the car today and it was snowing so i didn't bike, and wristwatch because i forget, constantly, that i'm wearing it; it's just a part of me. generic Timex Weekender with a nylon strap. does nothing special but tells me the time, accurately, on a face i can read, even in the dark.
Handkerchief users represent.
it's so handy. 99% of the time I use it to clean my glasses, but if I'm with someone who's crying, if I need to clean off a screen, if something's dusty or gross but I need to pick it up, if I get sweaty and need to wipe my brow, if something gets spilled and there are no napkins handy, etc I can use it. when my dad passed I got all his; he was a high school principal most of his career and carried one every day.