Subway at Vermonth South have had a VIP card that allowed you to receive a free cookie or regular sized post mix drink with the purchase of any sub, salad or wrap.
I just noticed the VIP card has now been updated to include a 600ml Mt Franklin water. Pick up your card in store. Only valid at Vermont South, Forest Hill Chase and Burwood One. Not valid with other offers.
There is no expiry on the card but I doubt it would be indefinite. They won't be making much money if they were giving a free water with every 6" sub.
def get the cookie. if you're thirsty, just add more sauce :)