Don't add salt. It will freeze your drinks and your ice will melt a lot faster. I precool my coolers with frozen gallon jugs, but take them out when adding ice. They take up way too much room for Cold Beer. I do put frozen water bottles in with the ice and beer, and it keeps cold a lot longer than just ice.

Just read the post again. I thought he meant adding salt to the ice. I've never tried adding salt to a water jug.