Costco Sale: BACtrack C6 Keychain Breathalyzer $27.99

*UPDATE* 12/5/18. Simply blow through the mouthpiece and your estimated BAC results are displayed instantly. Select Costco locations have the BACtrack C6 Keychain Breathalyzer on sale for $27.99 (after instant savings), now through December 16, 2018. That is $7 off Costco’s regular price of $34.99. While supplies last. Price, participation, and sales dates may vary by location. This product was spotted at the Covington, Washington Costco. It may not…