Cant add some additional items when using coupon – Domino's Pizza USA Review

From my experience, if you are logged in and select a coupon to use as a carryout order, you cannot add additional items that you may want specifically such as dipping sauces and drinks. The app will recommend some items to add to your order at the review or checkout stage but you cannot specifically add items to the order. For instance if I want to add a butter garlic dipping sauce to the $7.99 carryout special, its nowhere to be found. I want to add a 20oz Coke, nope, can only buy a recommended 2 litre. Frustrating
Review by Njneer75 on Domino's Pizza USA.