I have no idea what size it is, gonna assume 250mL. There's a competition attached as well.
From Facebook:
Come down to Sorrento Quay on Sunday the 14th of March between 10am – 12pm (AWST) for an ice cold Masters on the beach thanks to Mix 94.5. Take a selfie of you and your Masters Milk for your chance to WIN $5k and a year’s supply of Masters Milk!*
T’s & C’s apply: https://www.hit.com.au/perth/win/masters-milk-2021-166991
good luck with parking…it's a shitshow every time i go there.