According to the FMI Daily Lead a significant number of Amazon Prime members ordered groceries during the 2019 Christmas period.  This was facilitated by the deployment of a dedicated last-mile delivery system based on contractors with their iconic gray vans.  In 2019 Prime free One-day and Prime free Same-day delivery increased four-fold over the Christmas season compared to 2018.  Amazon claimed 5 million new Prime members and 3.5 billion customer packages delivered globally during the recent holiday season.  U.S. domestic orders for groceries included perishables, produce and fruit. 

Growth in Amazon home delivery obviously is at the expense of traditional supermarkets.  Walmart considers that their delivery systems and Click-and-Collect program will serve as a viable competitor to Amazon.