Hi Gwozik, looks like a little bit of discussion here:

https://3dprinting.stackexchange.com/questions/860/printing-multiple-prints-stacked-on-top-of-each-other
https://3dverkstan.se/protective-visor/faceshield-faq/


And you might check out these to see if there are any ideas that you could use:

https://www.myminifactory.com/object/3d-print-a-better-and-faster-stackeable-visor-faceshield-116968
https://www.prusaprinters.org/prints/27267


- Michael