To purchase a wine from the app you first need to identify the wine you would like to buy, either by searching for the wine or scanning a wine label. If you are searching, make sure the 'For Sale' tab is selected.
Tap the product card of the wine you would like to buy to get into the product information page and then select the 'Buy' button at the bottom of the screen.
Select your quantity, and click 'Checkout'. The app will walk you through a standard checkout flow and the wine is yours!