Whatastore built its checkout around fan favorites and fewer address mix-ups, starting with a checkout upsells carousel that shows three pages of Whataburger merch right under the order total. To protect its fast shipping, it added a custom banner asking shoppers to verify their address and a custom checkbox they tick to confirm it.

By pairing fan-favorite upsells with a clear address check, Whatastore puts add-ons in front of shoppers right when they're ready to buy and helps head off wrong-address orders before they ship, which matters when most orders go out within 1 business day.