BENTONVILLE, Ark. — Walmart is expanding its meal kits nationwide after testing the service in some of its stores, heightening its competition with Amazon.

Walmart Inc. (WMT) said Monday that meal kits would be in more than 2,000 of its stores this year, after starting the kits out at more than 250 stores. Consumers can either buy directly in store, or order kits online and pick them up later that day.

Shoppers can buy pre-portioned meal kits that they need to cook, rotisserie chicken meals or one step meals that just need to be heated up. The meals feed two people and are priced between $8 and $15.

Walmart, based in Bentonville, Arkansas, has continued its battle with Amazon for shoppers. Amazon (AMZN) started selling ready-to-cook meals in July, shortly after it bought the organic grocer Whole Foods.

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