Kellogg’s has a reusable bag offer. This one isn’t completely free – you will have to pay $1.75 for shipping, but the bags are really cute! I know my kids will love them. You just have to purchase 2 Kellogg’s Cereals to get your bag for free. You can download the form here.
UPDATE: I just had a reader share with me that the Hen House Market location at 83rd and Mission had these bags in their store. So, you might check your local store to see if you can get them without paying the postage. I am not sure how it works since the bags are in the store and this is a mail in offer – so you will want to inquire within the store to find out for sure.