When I was in the Us working, my locker would not be without:
a box of tampax
instant soups in packages
instant meals in a cup
Never knew when you would miss a meal due to a long case and cafeteria was
only open certain hours, knowing something was there helped quite a bit.
Also tried to keep some frozen meals in the freezer with my name on it in big letters as an emergency back-up. Most of us, sometimes the freezer looked like someone's home.
Hope that this helps...........................