I've always baulked at buying these sorts of containers for food storage as they're so expensive, but these are now the right price. These are also the ones that have little tags you can slot in to label your food. Great for leftovers, packed lunch or freezing extra food.
1.8L now $2.87, 900mL now $2.19, 1L now $2.35
NOTE: Cheaper at BigW until the 17th, after that you'll have to get them at the supermarket!
Cheaper at BigW: http://www.ozbargain.com.au/node/23116