The amber liquid often found in half-filled jugs and jars on the side of highway where they were discarded by long-haul truckers.
The freeway ecology crews find a lot of strange things by the side of the road, but the worst are plastic jugs full of PISS, which they call "Trucker Tea". You see, truckers don't like to stop to take a leak so they go in the jug and huck it out the window. One thing all truckers have in common is that they have a pot to piss in and a window to throw it out of. Robert Downey Jr. gets to pick it up.