Canstruction is an international charity competition where architects, engineers, contractors and students they mentor, compete to design and build giant structures made entirely from full cans of food. At the close of the competition all of the food is donated to local food banks where the competitions are held. With more than 170 cities and over 30,000 volunteers participating in Canstruction competitions, Canstruction has grown to become one of the largest food drives for food bank donations in the world.