The service is available from 6 a.m. to midnight, seven days a week. One-hour delivery costs $7.99 and two-hour delivery is free to Prime members.

Though Prime Now is offered only in certain areas of Manhattan, Amazon says it hopes to expand to other cities in 2015.

Until then, Amazon says Prime members can download the Prime Now app and will be notified when the service becomes available in their city.

While this service is new to Amazon, it’s not a new idea and results have been mixed.

Kozmo.com, which flopped spectacularly not long after it was launched in 1998, just didn't see the demand investors had hoped it would.

And UrbanFetch, which operated similarly in New York City and London, faced pretty much the same issues.

PC World noted  that new services like Prime Now add value to Prime memberships, which ultimately drives people to use Amazon more often.

Amazon Prime also offers customers shipping deals, streaming services and early access to sales.

The company increased the annual price of Prime from $79 to $99 earlier this year, likely to cover added Prime perks in recent years and offset shipping costs.