And so it is, with the release of Red Arrow, that we finally learn the true purpose of the wrist joints on the molds.
yo has gone on about this at length already, but here's the short version: you don't use your wrists for archery, so Mattel giving the figures those joints is just stupid. But while they don't do anything to help create an archery pose, they work wonders if you're a junkie looking to shoot up.
Roy Harper was famously revealed as a junkie in Green Lanter #85. Ollie's dialogue in this toon is taken verbatim from the panel in question. Steve Rogers, of course, got his powers thanks to taking drugs, so of course he doesn't have a problem with it.
Meanwhile, Red Arrow is simply trying to keep his blood sugar levels in balance - in the new rebooted DC continuity, he was never addicted to heroin.
The needle he's using is real: it came with one of the Series 6 Lego Minifigures. The rubberband around his arm is real as well: it's one used to hold the figure in his tray, tied around the arm and colored digitally.