This is fun: twenty-six New York architecture, design and engineering firms are competing to build the best designs out of an unusual architectural medium: cans of food. I am particularly fond of the Candard, built by DeSimone Consulting Engineers, flying over the High Line park. (see the real Standard here) It is all for Canstruction, which ArchDaily describes as "an exhibition, design competition and canned food drive to help feed hungry New Yorkers in need during the Thanksgiving season."
Archdaily/viaThis is pretty impressive and tough to do, it's Downside-up: One CAN Make a Difference by HLW International. More images from 2010 at ArchDaily and Gothamist
Canstruction: Architects and Engineers Demonstrate Real Can-do Spirit
They use over 100,000 cans to build architectural models in support of New York food drive