Be on the look-out for the above item.  According to i Heart CVS, you will have to pay $0.99 for the card, but each time you go to CVS and use your green bags and scan your card your will recieve $1 ECB after the fourth scan.  You are limited to one card scan per day.

I am EXCITED for this!  Free ECB’s!! Now I just have to remember to take the bags out of the trunk, but this is a GREAT incentive!