PSPICE
*Purchase any large burger and get any BurgerFuel Thickshake for FREE. Soy included. Offer can be redeemed in-store by showing this email on your mobile device or printed out or via online ordering by placing the both items in your cart and putting in the code PSPICE at checkout. One voucher code offer can be used per person, per visit and per online order. Offer is valid until COB 10/09/2023 or while stocks last. BurgerFuel reserve the right to withdraw this offer at any time.
Tried the PSPICE code just now but got an error saying the voucher has been redeemed.
Then tried my luck with an old voucher code BBOSS. It worked!