MY 3D design is shown below. The rectangle is 3/4" so the barrel is in scale about 36" high.
Like the photo the cover has handles , the slats show under the circular bands and the barrel is of course open on the inside.
The 3D print must be printed upside-down because of resin suction issues; you cannot directly print closed objects because of an issue called cupping.
the .stl file is attached of both the barrel and the barrel top