Bottom compartment with dual zip openings provides cross-ventilation to dry pump accessories (blog.guguguru.com)
The same region is partitioned into top, middle, and bottom compartments from the Side view. (journals.plos.org)
To put the icing on the proverbial Big Top, so to speak, this bag also has a separate clipped bottom compartment, where the entire top of the bag opens on a hinge like its own circus tent, for easy access to items you need on the regular. (thedressedaesthetic.com)