You know our concept for “oases” on Mars – a mass-produced prefabricated hut for ten, with a rover docking adapter and personnel airlock for access, equipped with hygiene and life-support, stocked with food, emergency equipment, and basic repair supplies, and with enough power to run a small gas separation unit for air and fuel?
This is a larval version of that design. Appropriately, it’s even egg-shaped: ECOCAPSULE | Dwelling with the spirit of freedom
Note the similarity also with Buckminster Fuller’s Dymaxion House and the Futuro, in the sense of being a self-contained “system” (and, of course, round). In the case of the Dymaxion House, as the link indicates it too was designed to capture rainwater for use by the occupants (I was not aware of that fact).