Friends don't let friends drive before they BAC up their ability to do so safely, and I don't share mouthpieces...with just anybody, sooooo...Get these! You can even help a new friend stay safer! These are affordable, and come with a mini ziploc of 3 mouthpieces that fits perfectly in BAC's Carrying Case (see my review of this upgraded case). I was able to fit 4 mouthpieces in the ziploc and close it. This little packet does fit in the soft case that comes with your BACtrack too, even with a mouthpiece already attached for myself!
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