I don't have a lab, so I can't determine if it was pee. And I can't imagine you'd get to hold on to a job at Target if you poured pee out in the parking lot in front of customers.
Our friend with the USPS said "[at USPS] we’re allowed to travel as far as we need to find a restroom so no need to do it."
If this is the case at Amazon, then there shouldn't be a need to pee in bottles.
However, if this is not the case at Amazon, then what was apparently Bezos' tweet [1] was not reflective of the situation on the ground. I've written him directly before, and depending on the response, I may do it in this instance because he's not seeing what I'm seeing.
[1] https://twitter.com/amazonnews/status/1374911222361956359