Not sure why it's half price. Not even short dated (1 July). Not sure if store specific.
3 litre also half price
Other milk seemed to be 25% off.
At Woolworths, we care deeply and this new Drought Relief Milk range will offer our customers Woolworths Full Cream and Woolworths Lite Milk varieties for two litres and for three litres, with the extra 10 cents per litre to support dairy farmers in drought affected areas.