Great deal according to me.
Got 6 for 12 @$2each normally $8 each
They have different colours green grey pink mainly.
They are 500mL bottles haven't tested them yet though but they seem to be good If they retail for 8 bucks may be worth it for you.
Was definitely for me its double wall vacuum flask
May be out of stock or in stock @ your local Woolworths
I bought from this from metropolitan Adelaide.