What good are they? So glad you asked.
You can fill them with random stuff, like so:
Give them a little time…
TADA! Fresh squeezed, brand new, sparkly clean DIRT! Just right click to take it out of the barrel.
Hammers smash blocks into smaller pieces, like this cobblestone for example…
Just beat it up a little bit aaaand, instant GRAVEL!
Not good enough you say? Okay, give it another go!
Behold, SAND! Surely, you can’t smash sand can you? YOU CAN!
Dust? What can you do with dust?
More barrel stuff!
Did you know that barrels fill in the rain?
Is… is that clay? YES!