On Halloween, the M&M'S Halloween Rescue Squad will deliver FREE M&M’s strait to your door in under an hour, if you live in an where Gopuff delivers. This offer will go live at 3pm ET on October 31 and will only be available while supplies last. Go here and enter your address at the top right to find out if your address is eligible. Then, if it is, return on 10/31 at 3pm Et to score your free M&M'S!