- The Inventor: Bui Nguyen Khanh Uyen, Nguyen Huynh Thuy Giang , Ho Minh Quang

- Address: Gia Dinh High School, Binh Thanh District , Ho Chi Minh City

 - Description of technologies and equipments:

 Quang said: " We see the daily amount of waste discharged oil from the school canteen and a family kitchen. When oil is used repeatedly, it will produce many toxic substances that affect human health. Especially when poured down the drain, this oil also affects the environment because it does not dissolve in the water . Based on our knowledge , we think the reaction from petrochemical soap " .

 After they collected the necessary amount of oil , Quang, Uyen and Giang started on the research process , going through 3 steps : Oil filter , processing and refining.The oil filter process was quite long because they had to redo for many times until the oil was clear. As already familiar with the knowledge of chemistry, processing step was quite easy for them because it based on the saponification reaction. In the third step, refining was the most difficult task and took a lot of time .

They had to wash the raw soap to white off, adjusted the PH level according to safety range of the Ministry of Health. Afterthat, the soap was pressed into molds to form products. This step was also added additives soap to create colour and scent.