3-1-1 is rarely enforced. I always got confused why the 100ml limit existed, since I could just take multiple bottles of 100ml of whatever I wanted and it was okay. Then I realized that technically I only could take 3 bottles but I’ve been getting away with more for decades.

It's not 3 bottles, it's 3.4 oz or 100 ml.

It’s as many bottles sized 100ml or less that you can fit in a 1 liter bag.

Yeah, but arent you allowed to exit and re-enter security as many times as you like as long as you have a valid ticket?

Then you hide them somewhere inside and go back out and in again