My son is a Royal Marine and these are the contents of a box I sent last week:
Firstly I bought a plastic box (approx shoe box size) with a handle and snap locks on the side for a quid, hopefully he will be able to put this to good use after he's emptied it.
Anti-bacterial hand gel, chewing gum, disposable razors, dental flossers, wet-wipes, lip balm, hanging insect repellent, 1000 mile socks, batteries. Bags of sweets (plenty of choice with halloween coming up) Galaxy chocolate drinks, tic-tacs, strawberry flavoured space dust. . . and a sleeping mask with sparkly sequins around the edge that says F*** O** on the front!!
Urban Outfitters - F**k Off Eye Mask
Cheers