To some passengers, it seems like just another way to make going through airport security even more unpleasant. TSA is now random testing water containers and other drinks purchased in the airport. The original regulation was that any containers taken into the airport by passengers had to be tested or tossed away. 

The new rule includes all containers, including those purchased at airport concession stands and restaurants on the way to security areas. To many passengers, it may seem that the next security-tighening step at airport check-ins will be for TSA agents to hand out those little bottles you usually get for liquid-testing when visiting your doctor.