This is a cheats way But it works Fucking awsome..
Get a Large Water mellon.
1ltr bottle of good quality Vodka.
cut a small hole in the top of the mellon.
slowly pour the vodka into the mellon untill it absorbs all of the vodka
.plug the hole up.
leave it in the refridgerator for atleast 3 hrs.untill Icy cold.
Makes a Nice summer afternoon even nicer..