Chapstick is one of my favorites.

One few people think of are the single-use alcohol wipes common to first-aid kits. A step up from them are the single use acetone wipes used to remove the glue from adhesive tape. Both are flat and light foil packets that wear well, stay sealed.

The single-use foil packets of petrolatum is a tiny tube of napalm.

Antibiotic cremes, like Neosporin, are mostly petrolatum.

Many sunblock cremes and tanning oils burn well. Nothing like the smell of coconut and exotic fruit to bring that topical smell to a sub-zero tent. Festive.