While Supreme has been known to drop quite a few outlandish accessories (like the brick or SOG Axe) this Supreme BACTrack Go Keychain is yet another accessory that may go down in history as one of Supreme's best. This keychain is a working breathalyzer, giving you the ability to flex and stay safe all at the same time. This isn't Supreme's first "safety" inspired keychain of the Spring/Summer 2018 season, as they released a waterproof "Night Lite" LED Mini Glowstick fit for up to 60 hours of light. Either way, Supreme has your back this season. And we do too, because you can purchase this verified authentic keychain on StockX today.