Calling all Shop Your Way Rewards (if you’re not a member, sign up here for free)! Easy peasy freebie for you to score! Just text the word ZIPLOC to 56278 to join Kmart Mobile Alerts. Reply to their text with the letter Y, and you’ll get a text back with a mobile coupon valid for a FREE box of Ziploc Bags (valid thru 8/5)! You will need to click on the link that is sent back to you to receive your mobile coupon.