The Trunk is a furniture you can build (the Indoors page).
In-game description
A domed trunk banded with iron and a brass lock. Large storage: three rings, 54 in all. E to open.SHOWN IN THE BUILD RING
Building it
It costs 8 
Wood, 4 
Stone, 1 
Iron Ingot, 2 Water 7 Earth spirits. It needs 3 Jewels first. Take it down with DISMANTLE to get its cost back (see Building).
