This is a free simple "anti-droplets mask".
Scaled to the good size before 3D-printing.
(This design can give ideas about 3D-printed masks to anyone involved. )
This is only a prototype and should not be used for the moment as long as it is not certified by professional testings.
*** Use PLA for recycling possibilities and cover with waterproof 'material' ! ***
The Mask can be scaled on Z up to whatever you want, so the thickness is like 'parametric'.