As with most absurd laws in the US the answer likely depends mostly on the color of your skin or your social class
In my city we do music nights in the park and people setup entire mini bars to make drinks and the police don't bat an eye over it
I often times ride around on my bicycle with a can of something good and don't get bothered by the local police as well (though they could certainly get me for something more harsh than drinking in public if they wished to)
The biggest law I don't play with is Open container. Its illegal in my state to have an open bottle / can ANYWHERE in the passenger compartment of a vehicle
Just worth pointing out, changing water source in Flint Michigan and not adding corrosion inhibitors seemed to do an excellent job for a short period.