boxcatcher

From their website:  "In May 2016, an initial BACtrack Skyn prototype was awarded the grand prize and $200,000 in the Wearable Alcohol Biosensor Challenge. The challenge was issued by the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institute of Health. The goal of the competition was to find an accurate, non-invasive and continuous way to measure a user’s alcohol level in order to aid researchers. Our latest two designs are improved and smaller versions of our initial prototype."

Pretty good vote of confidence -- granted, this is will be a miniaturized version of the device that won.