I was making a coffee this morning and washing the milk bottle before putting in the recycling only to notice this promo on the label. Isn't a super bargain, but not too bad if you go to the movies regularly.
Simply purchase any specially marked PURA product, submit your unique code (found on the back of your milk bottle) and purchase a full price adult ticket ($19.10 RRP inc. postage & handling) using a credit card to receive one additional ticket (of equal or lesser value) for free.
Redeemable at any Greater Union, Birch Carroll & Coyle, Event Cinema or Village Cinema. Ticket valid for 6 months from date of issue. Seating and screening restrictions apply. Not valid with any other offer.
Offer valid from 12/03/2012 to 20/05/2012. Limit of 1 free ticket per unique code applies.
EDIT - It appears in the FAQ that this is open to WA residents only - though the tickets can be redeemed at selected cinemas nationwide.
WA Only by the looks of it :(