Mostly my FAK for short hikes and car camping has amounted to a few handkerchiefs, moleskin, and some OTC meds. Duct tape is already present so no need for any medical tape.

These days I am thinking I might add to that some, but not by all that much. IMO, a normal FAK should fit in a sandwich size zip lock bag. If it does not, then you have too much stuff.

But, that's just my opinion, FWIW, and I am a guy that would bring a thermos of coffee with him on a 2 or 3 hour hike.