Woolies has a few sales on their Brita jugs. Availability is store dependent.
The XL ones are on sale (~3.5L/3.6L) as well as the smaller 2.4L ones too.
https://www.woolworths.com.au/shop/productdetails/97502/brit…
https://www.woolworths.com.au/shop/productdetails/54949/brit…
https://www.woolworths.com.au/shop/productdetails/246524/bri…
https://www.woolworths.com.au/shop/productdetails/674765/bri…
Filters are on sale too