Free 100ct. CVS Alcohol Prep Swabs April 2, 2013 by hewella1 Leave a Comment CVS is offering up a coupon good for a free 100ct. of CVS Alcohol Prep Swabs. Up to a $2.59 value. The coupon is valid in-store only and is only good through 4/30 so you have plenty of time to use it. This is a nice little freebie to have on hand.