Gallon or > 2L insulated water bottle

We live up North and do a lot of car travel over a few days, having ice water on hand makes a huge difference.
I had a look on Amazon for insulated bottles that hold >1.8L and it seems most brands aren't available from Australia and the only available is Yeti which I think it's totally over priced and a complete ripoff. Any brands available in Australia that are good value? I have a sistema 1L that is great but really need something bigger for the whole family.
We've come from using a 2.5L blue esky jug but it's insulating properties aren't the best.