Starting at 5 p.m. on Oct. 31, the M&M's Halloween Rescue Squad will mobilize and deliver free candy to households across the country to save them from a candy catastrophe. Here's how it works: You have to live in a Gopuff delivery area to participate. Head to MMS.com/rescue-squad and click "Learn more." Submit your request for a candy refill. M&M's has partnered with Gopuff to delivery candy in under an hour, while supplies last.