Liquids are already banned to a large extent. You have to buy it inside the terminal after you get security clearance.
Done that, security check on one flight I was on at boarding forced all liquids to be emptied.
Get off one plane, go through security to the transit terminal.
Wander around, refill water bottles.
Buy some duty free, get it put in a cardboard box with a ziptie.
Go to gate, go through ticket check, some corridors to gate lounge.
Get cardboard box confiscated and put in a pile of similar looking cardboard boxes.
Asked to empty water bottle... where? You can't turn around. Chug a litre of water.
Have bags 'checked', go into lounge, refill water bottle again.
Pee three times.
Still better than flying through any US airport tho.