This is what I put in my DC's emergency shoe boxes. I also packed a basic store cupboard - pasta, pasta sauces, a couple of tins of beans, tomatoes etc, cornflour, cereals, tea bags, coffee, sugar etc, toiletries and cleaning products to start her off.
Chocolate bar, Hot chocolate sachets, Pens (red, green, blue & black), Pain killers, imodium, Plasters, Blister plasters, face masks, hand sanitiser, Tissues, bottle of water, Screwdriver (for plugs), spare fuses,
Cheap Toothbrushes (for guests who forgot), toothpaste, nail file, Sanitary products, small torch, Paper clips, elastic bands, string etc, Hair ties, Safety pins, Emergency meal (packet of instant pasta), mini box of cereal, Plastic cutlery & paper plate, Pack of cards, Notepad, travel Shower Gel/shampoo, Ear plugs, couple of aa & aaa Batteries, toilet roll (if box is big enough)
I'm sure there were a couple of other things that I popped in as I thought about it and forgot to add to the list.