• Researchers: Eleonora Charisse Lin, Julia Jeremiel, Cliff Santoso, and Steven Widjaja
  • Level/Campus: Primary 4 - Semarang
  • Abstract: This project explores the transformation of used coffee grounds into an effective, eco-friendly hand soap. Aimed at reducing waste and promoting sustainability, the soap combines natural ingredients like glycerine and castile soap for a chemical-free alternative. Tests on cleaning power, exfoliation, moisturizing effect, and scent showed high satisfaction, with most users rating the soap as good to excellent. Supporting SDG goals 3 and 15, this DIY solution proves that everyday waste can be repurposed into valuable personal care products. The result is an affordable, sustainable option that benefits both users’ health and the environment.
  • Coach: Ms Hana Vetriana