Amazon's Blue Apron knock-off is live - and it's already selling out

Amazon is now selling meal kits that would look familiar to Blue Apron customers - and they're already selling out.

On Tuesday, Amazon began selling kits that contain all the ingredients necessary to cook a selection of meals, including options such as stir fry, burgers, and tacos. Meals - which contain enough ingredients to prepare meals for two to four people - cost between $19.99 and $38.

By 9 am ET on Tuesday, five of the 19 single-meal "Amazon Fresh" options had sold out.

Amazon Fresh bears a clear resemblance to Blue Apron and other meal kit delivery services. When news broke earlier in July that Amazon had filed a patent for "prepared food kits," Blue Apron's stock plummeted, sinking 11%.