The weather outside is frightful, making it the perfect time to stock up on the essentials. And you don't even need to leave your house to do it, thanks to Amazon's new one-hour delivery service.

Prime Now has officially gone live to all of Manhattan, giving Amazon customers the opportunity to get one-hour delivery on items like paper towels, books, batteries, shampoo and other household items. It's an incredibly convenient service, and one that imposes its huge resources on smaller delivery companies that offer similar services. Prime Now customers can enjoy free two-hour delivery between the hours of 6 a.m. and 12 a.m., with one-hour delivery going for a flat rate of $7.99.

That's a tad expensive if you simply need some paper towels and other basic household items, but the convenience factor might more than make up for it. It's unclear what happens if the delivery exceeds Amazon's promised one-hour timeframe; I would imagine some sort of refund would be in order. All Prime Now items can be browsed and purchased through a dedicated app.

Amazon told Mashable its Prime Now service will indeed roll out to a wider user base, including other cities the U.S. However, the online giant declined to say when and where, which means folks in Manhattan are currently part of a pretty exclusive club. Not that that's really anything to brag about, but it certainly beats trudging out into the freezing cold snow.