The drum, chosen for its acoustic quality, may be a hollow tree trunk, telephone pole, stovepipe, rain gutter, cast-iron camp stove.
From the sfgate.com
Today, yurts follow the same basic design though they are usually covered in canvas, use an iron stove and stovepipe, and use a collapsible lattice work frame for the walls.
From the en.wikipedia.org
The black iron cookstove with nickel-plated trim usually had four or six openings with lids, a stovepipe to exhaust fumes and a low shelf in front that could temporarily hold a pot.