On my last trip to Denver I used up an old roll of expired fujichrome 120 film with the intent of using it to try developing it with coffee and vitamin C, otherwise known as caffeinol. I wasn’t sure if color slide film would work with coffe developer, but I had nothing to lose. To my delight, it worked better than I expected. The film was on the grainy side and dark, but definitely acceptable. Perfect for the pinhole photos I like to take. If you are interested in the process, there is a pretty good YouTube video that explains how to do it.