As per the T&C's 1 the bottle is worth $30 but I highly doubt it.
Stock is limited and the free offer is only available for Click & Collect and in-store.
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Terms & Conditions:
*Excludes Coronita case purchase. AU residents 18+ only. Overall comp runs 01/01/20 to 31/12/20. Outlets will run comp on dates they advertise. During advertised comp period, buy any 24 case of Corona Ligera bottles or Corona Extra bottles or cans in an outlet which is displaying promotional material to get a 600ml Corona x Parley Stainless Steel Water Bottle ($30), if stocks remain. Limit 1 gift per person per day & per transaction. Claim gift when making purchase. Gift not transferable/exchangeable/redeemable for cash. Subject to consumer rights under e.g. the Competition and Consumer Act 2010 (Cth), Promoter is not liable (including in negligence) for any loss, damage, injury or death in connection with this offer or any gift, except liability which can’t be excluded (which is limited to the greatest extent allowed by law). Offer not sponsored/endorsed/administered by/associated with Facebook, Instagram or Twitter. Promoter: CUB Pty Ltd ABN 76 004 056 106. . ↩
It's the same $9 ones as kmart