Oil Containers, LSD Barrels, and Meth Barrels all have the same image. This leads to confusion when trying to sort out between all 3.
Example 1: You're selling oil to Rockefeller, but accidentally put in LSD or Meth
Example 2: You're doing a crew deal for LSD: Meth, but something either gets mixed up or an accidental oil container gets slipped in there
Although these things can be solved through close examination of every item, it would be best if all 3 aren't the same image. Perhaps a change in color for each of the barrels could be a good addition, or different images altogether for LSD and Meth.