If you would like to adjust the "Fee" image you can easily do so.
Step 1 - Log into your store
Step 2 - Go to the products area
Step 3 - Locate and edit the "Fee" Product
Step 4 - Locate the main image as well as images for each variant. The Canteen App works by creating a variant per rule you setup in the Canteen App backend. You can add specific images to each variant/rule or one main image.
Step 5 - Click Save and you are done.