Delivery startup Doordash is promising to send 7-Eleven slurpees and pizza to your home in 45 minutes or less

DoorDash, a startup that delivers food from local restaurants across the country, is partnering up with 7-Eleven.

Starting today, if you live in New York, Los Angeles, or Chicago, you can use DoorDash to get drinks, food, and household goods delivered to your door in 45 minutes or less.

DoorDash's "dashers," its delivery people, will bring customers their choice from 250 "curated" items at 7-Eleven, ranging from kitchen essentials to snacks and fresh food.

In addition to the cost of their purchases, customers will also pay a $2.99 delivery flat fee.

In addition to typical offerings, DoorDash and 7-Eleven will be offering something called "convenience parks," DoorDash CEO and cofounder Tony Xu told Business Insider, which will consist of common items you might need to host a dinner party, for example, or for recovering from a cold.

DoorDash has partnered with restaurants like Taco Bell before, but its partnership with 7-Eleven marks its first foray into delivery outside of just restaurants. The company has much bigger ambitions - to use its logistical delivery infrastructure to deliver any number of things in the future.

That goal puts it in competition with a swelling number of other startups trying to tackle the speedy-delivery space, including Instacart, which recently raised $220 million and Postmates, which delivers small orders with a $5 delivery fee.

Bigger players like Google, with Shopping Express, and Amazon, with AmazonFresh, are also experimenting with same-day delivery.

DoorDash, which has raised almost $60 million at a nearly $600 million valuation, says it'll be rolling out its 7-Eleven delivery service to Boston and Washington DC in coming months too.

Customers can place orders through the DoorDash website and its iOS and Android platforms.