Postmates, the only on-demand delivery platform that can deliver anything from anywhere, announced an exclusive collaboration with Shake Shack to bring customers free delivery through December 17 across 17 U.S. markets. From the ShackBurger, to classic crinkle-cut fries and the Chili Cheese Dog, customers can now get all their Shake Shack favorites delivered in 35 minutes or less via the Postmates app. To participate, customers can download and open the Postmates app on iOS or Android and score free delivery to their door of any item from Shake Shack's acclaimed menu. For the same time period, Postmates users can also score a code to send a free ShackBurger to a friend—and in return, receive a free ShackBurger themselves.

"We're thrilled to team up with an iconic brand like Shake Shack to bring our customers even more of what they want—on-demand," says Russell Cook, senior vice president of operations at Postmates. "Shake Shack's menu has developed a cult following from coast-to-coast, so we're excited to let our customers share the Shake Shack love with their friends and family."

"We're excited to collaborate with Postmates and offer our guests yet another way to experience Shake Shack—when, where and how they want it," says Zach Koff, chief operating officer at Shake Shack.

To order, visit Postmates.com or download the Postmates app on iOS or Android. Through December 17, customers can download and open the Postmates app on iOS or Android and score free delivery to their door of any item from Shake Shack's acclaimed menu. For the same time period, Postmates users can also score a code to send a free ShackBurger to a friend—and in return, receive a free Shackburger themselves for a future Postmates order.

Postmates has the largest on-demand delivery fleet in the U.S. of 120,000 Postmates who operate in more than 250 cities—providing access to over 250,000 merchants on the platform. Postmates is the largest on-demand delivery app in Los Angeles—the largest consumer market in the U.S. The business now completes 2.5 million deliveries a month and has a $1B sales run rate. Postmates' average delivery time is 35 minutes or less, and normal delivery fees are a flat $3.99 and no service fee nationwide for Postmates Partner merchants. Postmates Unlimited subscription services offers no delivery fees from any merchant for $9.99 per month or $6.99 per year, when paid annually.