CPAP Inline 3D Printable Filter

With the current Corona crisis I found it very hard to get hold of a replacement CPAP Inline filter replacement. I've been designing and building face masks to 3D print lately and thought these CPAP inline filters are not that far from what I was already doing so thought I'd have a go. I'm by no means saying these should be used all the time but with the right filter material this may be an option until the official one arrives in the delayed post. I've printed all parts at 0.1mm layer height using 100% infill without any supports. This seems to fit nicely and screws together well. For Now I'm using 2 layers of dust mask material cut to size but still experimenting. I know this isn't perfect but better than nothing. Any comments or suggestions more than welcome.