Italian man Cristian Facassi, owner of Italian innovation company Isinnova, designed a 3D-printable valve to turn snorkel masks into an emergency respiratory mask to help Coronavirus patients breathe, and has put the design plans online for free. – WTF Fun Facts
Source: https://nypost.com/2020/03/27/italian-engineers-are-harnessing-snorkel-masks-for-cpap-machines/