Microwave liquid tester for airport security

Testing an airline passenger's plastic bottle for flammable liquids = good, but having security attendants test the bottle-in-question by taking a whiff = bad. Not only do security attendants generally lack police-dog-style sniffers, but scent doesn't always reveal flammability, and passengers generally don't want some security shlob sticking their nose in yer soda. To combat such a problem Japan's Kansai International Airport has introduced a security device that uses microwaves to test a passenger's plastic bottle to determine flammability. The device then analyzes the reflected waves and flashes a red or green light to indicate the result.