Simple bowl-shaped water catchers, Hollowdrum is a lifesaver for various inhabitants of the Primal Forests. Where freshwater is available in the rivers and streams that flow through the woodland, it is often dangerous to approach due to the myriad of dangerous creatures that call such water their homes. As such most creatures use Hollowdrum to harvest drinkable water and satiate their thirst. 

The largest Hollowdrum can reach several feet in diameter, and can be a mini oasis for smaller water-dependent lifeforms. If a Hollowdrum is taken up from the earth, it immediately shrivels and dies, making it impossible to harvest or move. However if a small portion of their roots are taken, they can be transferred to soil to grow more.