The blue barrels are the living quarters for the cobalt simian crewmembers- they have more fun.
I always thought that it is used to throw waste from the ship, and it can be closed when neededIn 'First Contact' Picard showed off a force field window which I think was a totally needless

), and while the Cerritos is being repaired, I imagine that most of the crew are quartered on the station - either in their own quarters/apartments or in temporary ones if their home is elsewhere.We use essential cookies to make this site work, and optional cookies to enhance your experience.