Some barrels that fit in nicely with existing Citadel ones, but add a little variety.
I have a tonne of the normal ones, I just wanted a little bit of spice.

All are 25mm high, which is a handy cover height - demonstrated by Colin the cultist-for-scale. You can see them alongside the Citadel ones, in brown.

The supplied models are currently:
Type 0 - no details on sides or ends.
Type 1 - oval labels, screw cap near base.
Type 2 - diamond labels, ridged panels, fill caps on top.
Type 3 - inset lines, pressure-fill cap on side, cog designs on ends.
Empty - an empty Type 0.
Alchem drum - rounded barrel in the style of a plastic chemical drum.

ELEGOO

ELEGOO MARS 2 Pro

No

Yes

0.02mm

I used Elegoo ABS-like grey.
0.02mm layers @ 2s exposure time.
5 burn-in layers @ 35s exposure.

I've added a photo of how I printed - a 30 degree angle, and drainage holes top and bottom.

The barrels here were literally just removed from their supports (by ripping, no tools) and cured. As such, the drainage holes I added for printing are still present - they can be reasonably added to flat surfaces where filling should be easy.

I have not tried to print solid versions, more for fear of suction-cup effects rather than a desire to conserve resin. But I am an amateur, so that's up to you.