FREE Tampons after ECB’s at CVS This post may contain affiliate links. Please see the full disclosure policy here. Posted on August 17, 2009 Written by Mary Leave a Comment Common Sense With Money, is reporting that 10ct boxes of regular and super CVS brand of Tampons are $1.89 and generating a $1.89 ECB! Making them FREE after ECB. This is NOT in the ad, so it is a “hidden deal”. Im unsure of the limit!