How about the Duty Free
This is only one of a huge number of contradictions in supposed airport/airline security...How about the glass bottles available for purchase in most airport "duty-free" shops or even on board some aircraft...we happily let people wander around with those.
On a related note but slightly more logical...I note the authorities in AMS have removed the security check from immediately after immigration and now put the machines and search cone at entry to the departure gate - Far more sensible and appropriate if more labour intensive for the airport authority.