It's the flooding problem most of all. I'm in one of the few Manhattan co-ops that still allows washing machines and dryers and it's a wonderful thing to have it in my apartment. But many landlords, co-op board and condos don't permit them because of the flooding.
A couple of my friends and I made hot ice for our school science fair. We used sodium acetate. This project won first place at my schools science fair!!! Materials: Stove. Pot. A spoon. A glass cup. and Sodium acetate (you can find it online or in certain heat packs). How to do it: You heat water in a pot and put the sodium acetate in the water.
Of course, you need to know the best way to pack your cooler, and we are here to tell you how! To keep things cold with dry ice, you have two options. The first is to place the dry ice on the bottom of the cooler, cover it with a piece of cardboard with holes in it or a towel, and place your supplies on top.