Starbucks takes a dime off if you bring your own cup, Mariano's Fresh Market gives you up to $.25 off your order if you bring 5 of your own bags (and they double coupons on Wednesdays so that's another awesome reason to love that store as if you needed one more). I'm sure there are more out there that I haven't found yet, but it's nice to see rewards for simple effort. We keep our bags by the door and grab them on the way out. Good times. Great savings.