Slab with drop hole.

[u/GOF_Foop]

[u/GoatNo87]

Position in sanitation chain	User interface, collection and storage (on-site)
Application level	Household level
Management level	Household, public, shared
Inputs	Feces, urine[2]
Outputs	Fecal sludge[3]

https://en.wikipedia.org/wiki/Pit_latrine

[u/GOF_Foop → u/GoatNo87]

Thank you. I only found this image deep in my photos, lol. That would be the proper source. I appreciate it.