Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
While reading this answer I ended up watching a couple of youtube videos and heard this guy mentioning a "Dakota fire pit".
I hadn't heard about it before, but could easily find a few images by searching the web:
Seems pretty straighforward, but the question remains:
Sources: Modern Survival Blog, Survival Topics, @DCShannon, @Liam
Required, but never shown