$19 for BACtrack Keychain Breathalyzer + Free Shipping ($49 Value)

Whether it's a few beers at the beach or martini night with the girls, drink responsibly this summer with today's deal for a BACtrack Keychain Breathalyzer from Apple XOXO for just $19.

This compact, 2-ounce keychain breathalyzer quickly and accurately reads your blood-alcohol level with a semiconductor sensor. With a sleek design that fits discreetly in your pocket or purse, the breathalyzer is equipped with a foldable mouthpiece, flashlight and clock.

Simply turn on the device with the touch of a button, pop out the mouthpiece and exhale for a single five-second breath. Then the two-digit LCD display screen will display your BAC clearly during day or night with a -0.01% BAC accuracy.

The package also contains an instruction manual and three additional mouthpieces so the device can be shared among friends. The keychain requires one AAA battery, which can last through a minimum of 50 breath tests.

Wherever the summer takes you, go responsibly with the sleek and compact BACtrack Keychain Breathalyzer.