Amazon said Tuesday it has launched one-hour and three-hour delivery services in parts of the United States, as it seeks to meet growing demand for faster shipping.

The company added that three-hour delivery is now available in about 2,000 U.S. cities and towns, while one-hour delivery is offered in hundreds of those locations.

“Our customers are busier than ever and are looking for new ways to save time while keeping their households running,” Udit Madan, Amazon’s senior vice president of worldwide operations, said in a statement.

More than 90,000 items qualify for delivery within three hours or less, spanning categories such as pantry essentials, cleaning products, over-the-counter medicines, clothing, and toys.

Amazon said it plans to expand the service to additional parts of the country in the coming months, following limited pilot tests that began late last year.

“We’re excited to say that two decades after Prime launched, we’re still innovating to make delivery even faster, while maintaining the same everyday low prices and vast selection Amazon is known for,” Madan said.

Customers can also explore ultrafast delivery options through Amazon’s Get It Fast page.