Huh?

So I'm supposed to put my ISO800 film in a clear-plastic bag to make it easier to screen, but I'm not allowed to bring my tea in a clear plastic cup?

What if I put my film in a clear plastic cup?

Is this a (relatively unknown) new national policy, or is this a Seattle-only inconsistency?

Is this a restriction on drinks carried in the walk-through, or are empty clear-plastic cups in my carry-on now disallowed? What about empty/full plastic bottles?

I never had anything against the policy of x-raying all drinks as long as it was consistent, but if it's disallowed in carry-on, this is a new level of TSA policy stupidity.

(If you take away my water bottle and make be buy the overpriced one in the terminal, I will say screw the flight, complain loudly, exhibit "security rage," call for the LEO myself, and demand to be arrested. The stupidity of doing that is beyond my comphrension and I don't want to live in an American that is that idiotic. That's as stupid as (or stupider than) making the woman drink her own breast milk.)