I just saw this offer on Facebook - it doesn't appear to be required to redeem, just print the offer.
50% off Feeney's Irish Cream or Creme Brûlée. Max 2 bottles per person.
Unfortunately I don't know the original price to let you know how much it will be. BWS don't list their prices online (that I can see) and I don't have my car to go visit my nearest store. Dan Murphy's full price is about $20 usually - perhaps it will be similar?
Edit: thanks to those who found the price - it's around $26 rrp.