I have always sent them off with 2 plastic tubs.
The first is first aid so ibuprofen, paracetamol, cold & flu, rehydration sachets, plasters, lip balm, halls soothers, electrolytes, berocca, vics, deep heat, wipes, packs of mini tissues, disposable gloves, condoms and those star spot stickers.
the second is useful bits - screwdriver, sellotape, scissors, mini sewing kit, glasses wipes, screen wipes, lint roller, phone screen protectors, blue tac, cotton buds, sharpie, a few pens, string, safety pins, stain removing wipes and then I put £20 in coins in a coin bag in there.
they have always been well used by all housemates! And I would restock periodically.
Starting university away from home is hard however independent they are, and this just takes away a little bit of stress when they are feeling under the weather etc