Truck drivers are often owner operators on exploitative leasing terms or training terms with their employer that dictate they must work X amount of time or they owe Y training cost, usually in the 10s of thousands of dollars. In addition to this, drivers are typically paid by the mile, which means they’re not paid at all for any time they take breaks, or even while trucks are loading or unloading. Not to mention the razor tight schedule they’re expected to make. Piss bottles, like every other uniquely horrible American cultural artifact, are a result of overworked and underpaid workers trying to make the best of their situation. They’re literally saving time and making money by pudding in a jug.