Head over to the Nursery Water Web Site to get your FREE bag. It can be used for a grocery bag and comes with a pouch to clip on your purse (or coupon binder zipper!) so you don't forget it again.
They give these bags away EVERY day at 12 p.m. EST (10 a.m. MST). There is a limited number, so if you don't get one today, go back tomorrow and try again!