I bought a pack of plain black / grey / cream zippy cotton canvas bags - sort of make up bag size (20cm x 10cm).
I labelled them all with iron on vinyl (but you could prob use a sharpie on the cream ones), and now i have 4 or 5 in my handbag.....
Feel Fresh = tissues, hand sanitiser, wipes, sanpro etc
Feel Better = painkillers, allergy tabs, plasters, small savlon etc
Charge Me = Various charging cables, 1 plug, charging bank
Make a note = pens, notepad, plectrums (don't ask - they're for DP!)
Means I'm not scrabbling through a bag of random bits every time I need something, plus if i want to change over to a different bag it's super easy!