Power Shift is a national youth climate summit that started in 2007 and occurs every 2 years.  The 2011 summit will be held at the Washington DC Convention Center and 7 DC food trucks will be on site to serve the hungry environmentalists.  The attendees will surely be evaluating the containers that the 7 trucks use.  As far as I know, they all use environmentally friendly containers.

More info on the event can be found on the Power Shift 2011 website or in the Washington Post article.

BTW – BBQ Bus will be in attendance!