Muhammadiyah 10 GKB Gresik High School students Amalia Dwi Berlianti, Arina Felisia dan Aulia Nabila Syaban hold up the moringa leaves used to make the mouthwash that won them a silver medal at the 2020 World Invention Competition Exhibition [WICE] in Kuala Lumpur, Malaysia earlier this month (KOMPAS.COM/HAMZAH ARFAH)