I know that I have some readers out there who are home haunters or own their own haunted attractions so this should be your bag. Apparently through this site you can design your very own energy drink to resell at your next event. I'm not sure if it's limited to those in the haunting business or if filmmakers can get in on the act to promote their flicks though.
At the moment the going rate to create your own energy drink is not exactly cheap. But if you can manage to sell them at your own event then I guess it would be awesome deal.
For more go to www.screamingzombieenergy.com