In an apparent effort to compete with Amazon and Whole Foods, Walmart has teamed up with Uber to deliver groceries. 

You have to buy at least $30 worth of groceries, and the delivery fee is $9.95. Walmart tested this in two test markets: Phoenix and Tampa. They are now expanding the service to Dallas and Orlando. 

Walmart is still figuring out all of the logistics of the service. Sometimes they used their own Walmart drivers and trucks while other times they used driving services such as Uber. According to some sources, the site is incapable of telling you what mode of delivery your groceries will come by.