With just a flash of its LED light, the keychain-sized pd.id can let a person know if their drink is safe or has been spiked.
The new invention is able to detect alcohol, Ambien, Rohypnol, and other benzodiazepines, The Daily Beast reports. It's simple to use: Dip it into a drink and wait for a few moments. If the drink is safe, the light on the pd.id turns green. If it has been tampered with, the light turns red. The pd.id is battery-operated, and can be used about 40 times before it needs a charge.
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