Bantubumi is a green startup transforming used cooking oil (UCO) into a sustainable resource through traceable collection systems. We operate a community-based network (RUMPUN) to collect UCO from households and work directly with small businesses such as restaurants and caterers. By combining digital traceability, incentive models, and grassroots engagement, we help reduce improper oil disposal and support renewable energy supply chains. Currently operating in Greater Jakarta and Palembang, Bantubumi contributes to the circular economy and a cleaner, healthier future.