How did Maul survive the fall?

I was under the impression that he somehow directed himself into an air vent that was on the wall of the reactor shaft, but Wookiepedia says:

”Maul managed to survive being cut in half as his top half fell down the reactor shaft and into a trash container”

So I guess there was a trash container at the bottom of the shaft? If so then why would it be there?

And finally in the comic above it shows some liquid appearing that he falls into. What is it and why is it there? I haven’t actually read the full comic so if someone could fill me in that would be nice.

Bonus question, what happened to the other half of his lightsaber after he fell?

I was under the impression that he somehow directed himself into an air vent that was on the wall of the reactor shaft, but Wookiepedia says:

”Maul managed to survive being cut in half as his top half fell down the reactor shaft and into a trash container”

So I guess there was a trash container at the bottom of the shaft? If so then why would it be there?

And finally in the comic above it shows some liquid appearing that he falls into. What is it and why is it there? I haven’t actually read the full comic so if someone could fill me in that would be nice.

Bonus question, what happened to the other half of his lightsaber after he fell?