This was done! It created terrible publicity incidents like the TSA forcing women to drink their own breast milk to prove it was safe. And not all liquids subject to this are things a person should swig even if they aren’t explosives. The extremely negative PR rightly stopped this practice.

Is that practice not really common? I’ve seen that done as a matter of course on lots of international airports with baby food / liquid and no one seems to get too fussed about it.