https://www.cnet.com/news/walmart-will-let-you-shop-for-groceries-using-google-assistant/

Walmart has been beefing up its online grocery business as part of a push to become a bigger player in e-commerce and take on Amazon. In March, the retail giant started expanding its online delivery service to over 100 metro areas nationwide. It's expected to eventually reach 40 percent of US households.

Walmart Voice Order can also reference grocery items that customers have bought before. For example, if you purchased a bottle of 2% Omega milk before, you can just say "milk" and Google Assistant will know to order that specific kind of milk.