Comment by regularfry
2 days ago
Cynically, it's so they can sell you another bottle on the secure side. If they spend money to give themselves a working mechanism to distinguish water from not-water, they lose the ability to create retail demand.
2 days ago
Cynically, it's so they can sell you another bottle on the secure side. If they spend money to give themselves a working mechanism to distinguish water from not-water, they lose the ability to create retail demand.
I understand the idea, but it's not completely true: I empty my bottle before the security check, and fill it after in a fountain.
Then you have successfully circumnavigated a problem that more forgetful people will run into head-first. It doesn't have to catch everyone for the shops who are tenants on the secure side to complain about lost sales.