Standalone Drybox - without humidity sensor

This is a remix of Ondřej Stříteský's "Standalone Drybox - with humidity sensor".

This version only contains the bottom without the hole for the humidity sensor. Get the rest from Ondřej's original.

You can place five pieces of this drybox on the top of the Prusa Printer Enclosure V2.

Build instructions are the same as described in the article: https://blog.prusaprinters.org/dryboxes-and-alternative-spool-holders-not-only-for-multimaterial-upgrade/