Yes the Homeless stress with the biggest stress out - cold bottled water. I have found Iceland give the most value for money.
Also they can't stress sanitary products enough and hygiene enough too - like wipes and not let's forget our pets. And that is true re the hot water, like Cupa Soups, Noodles like anything that can be "melted" with boiled water fills.
In Belfast there is a Homeless that comes out from 8.00 to 11 I every day - that will give you the best that they can do. Food and parcels.