Bufflao Can Bins for the food challenge will be seen around campus starting April 1! Buffalo Can Challenge is CU’s annual competition organized to raise awareness about hunger in Boulder County and collect food and resources for Community Food Share, Boulder County's Food Bank. Registered groups design and build a sculpture out of nonperishable food items to raise awareness about hunger. The Buffalo Can Challenge will take place on April 17 in the Fountain area outside of the UMC. 11am-2pm. Judging at 2 p.m.