© Andreas Tekautz, UnravelTEC 2020, CC-BY 4.0
This lid (IoT-Watchdog_Voroni-Deckel.stl, white and Iot-Watchdog_Schriftzug.stl, blue) is intended to be mated with Carter Multz' base cases with hexagonal holes, which are used for the IoT-Watchdog case.
How to mate this lid with Carter's case can be read in a (german) blog post.