This is a module holder for the Carbon Shine tool by @laisch https://www.printables.com/model/672272-carbon-shine-carbon-rod-cleaning-tool/collections using the MMSS system by @jorge_rui https://www.printables.com/model/556159-multi-modular-storage-system-mmss
I use one with IPA, and the other to dry off and remove any debris on the carbon rods of the Bambu Lab X1C