Yeah, sorry kid, but the fingers on those gloves will start to disintegrate before you know it. Either the seams will pull apart or the fabric will get worn through.
So true. I always skip the nylon and plastic crap and go straight for the rawhide. An example where the modern solution is inferior to the Bronze Age solution!
Clothes are probably the upper tier of stuff that's sellable outside the territory. Alcohol is easily transportable. Fuel, is asking for issues, but they probably have mopeds or some other farm equipment.
Speaking of explosives, the entire selection of liquid propane, white fuel, kerosene, gasoline, paint thinners, mineral spirits, denatured alcohol, naptha, etc etc, is like handing a live electric wire to a six year old. Ain't no way they figure out the safe usage before they burn the entire city to ash. These are old medieval buildings, all timber and wattle-and-daub. One errant spark can take out a bloc. The girls literally did that in the dragon floor already... Someone will figure out how to lob the stuff over a town wall and create the first weapon of mass destruction. (Fill garbage bag, put garbage bag in a barrel, put barrel in a trebuchet, band the barrel with flint, fun happens!)
I can see modern processed foods, with their intense flavors and addictive amounts of sugar, creating a panic in medieval society. Noble lords will be starting wars over boxes of wheat thins.
I'm thinking pool noodles, mops, 12 pack of slim jims (though that might be a boon), a literal bucket of bolts. The best gag prizes would be stuff that isn't immediately obvious of its utility but s-tier in that one specific situation.
Depending on what grade of steel the bolts are, they could easily be the best tool steel their society has ever seen. Give a bucket of Grade 8 medium-carbon bolts along with a box of Borax for flux, you can make hardening steel that's not too brittle- perfect for swords and polearms. Add a couple of Grade 12 Chromium-Molybdenum bolts to add corrosion and oxidation resistance. They'd be worth their weight in gold to a Medieval lord.