I recently constructed a compact compost freezer. In San Francisco, we have a municipal compost collection service that picks up large bins from the curb. However, using a smaller container on the countertop often results in unpleasant odors, flies, and torn, soggy bags. My (now) wife introduced me to the idea of storing a small compost bag in our freezer, which solved these issues but consumed valuable freezer space. To address this, I designed a mini freezer with the form factor of a small floor trash can, featuring a foot-operated lid.