Awesome idea from lifehacker.com
If you want to cook corn for the masses, Bon Appetit suggests a dead simple, ingenious method: “cooler corn.”
Basically, fill a large, clean cooler with loads of corn on the cob and pour two kettles-full of boiling water over the corn, then close the top.
30 minutes later, your corn will be perfectly cooked.
Campers and other outdoorsy people probably already know this trick, but the rest of now have a new, neater way to make lots of corn for company.
Do It And How 
This would be great for large crowds. Definitely going to try this one.
Not sure how I feel about the idea of boiling water being poured into a plastic container. Any info on the PCBs in that stuff?
We have cooked the corn and left it in the cooler to stay warm for a long time…works great