Purchase any large gourmet burger and get a Thickshake for FREE. Offer includes soy thickshakes. Offer does not include special thickshakes. Offer can be redeemed in-store, by showing this email on your mobile device, printed out, or via online ordering by adding both items to your cart and entering the code SHAKEONUS. One voucher code offer can be used per person, per visit and per online order. Not available with any other offer. Offer is valid until COB 12/06/2022, or while stocks last. BurgerFuel reserve the right to discontinue this offer at any time.