This is the material of the presentation of the Workshop OIL|Issues Organic Lab, Shanghai September 24/26/27. The workshop explores the topic of food safety from the last phase of the cycle, the disposal. It is organized as a bottom‐up design activity that involves students and a group of citizens and professionals interested in waste management issues are also involved in the workshop activity. Inside the wide topic of waste management, the workshop will focus on the life‐cycle of the cooking oil.