Summer and beer coolers

Nothing like a cold beverage during a hot summer weekend. Now is there any truth to this?
http://antoine.frostburg.edu/chem/senes ... ater.shtml
I do remember making ice cream with my grandfather. Dry ice and rock salt used as a coolant. Yet we use salt to de ice sidewalks. By the way.. that ice cream was to die for.. but now I like cold beer. So if I put salt on the ice in the cooler it would cool better? And longer?
http://antoine.frostburg.edu/chem/senes ... ater.shtml
I do remember making ice cream with my grandfather. Dry ice and rock salt used as a coolant. Yet we use salt to de ice sidewalks. By the way.. that ice cream was to die for.. but now I like cold beer. So if I put salt on the ice in the cooler it would cool better? And longer?