My gal works as a holiday rep in Mallorca & carries quite afew useful odds & sods in her purse/bag (Some Louis Vuitton "monstrosity" costing £700!!).
Apart from all the usually "girly" stuff, she has bottled water, little first aid kit, sewing kit, spare undies, Minidisc player & minidiscs & Im pleased to say that she DOES carry the items I gave her:-
Fauxton, whistle, glowring on keys
LED light (Nuwai clone) in her bag, Swisscard in her bag.
I recently added one of those silk traveller sleeping bags & Im told shes used that quite alot whilst travelling overnight on coaches between resorts & venues.
She thought the idea of EDC was a bit "geeky" at first until I suggested tat she already EDC'd quite a bit of stuff.