What kind of bags do you use for breast milk storage?

I have been using mostly Ameda, Medela & the Lansinoh bags. While it isn't necessary, I (and my parents and in-laws) love the spout on the Ameda bags but they are a bit pricey and I can't buy them at Target! The Medela bags are OK and I like the Lansinoh the least since a few of them have cracked in our deep freezer.
I picked up some Nuk bags tonight and they lay flat like the Lansinoh bags but seem much more durable!