Have the cashier scan the tag attached to any reusable shopping bag. After 4 uses on your CVS card, you will earn $1 ECB!
"You can use any reusable shopping bag, re-use a plastic bag from a previous purchase, or simply carry out your items. Anytime you decline a one-time use plastic bag, you will receive a Green Bag Tag™ credit."
Starting on 04/01/10, for one year, CVS will donate $.05 to World Wildlife Fund for every Green Bag Tag sold.