Whole Foods is where we got our reusable bags when we'd travel to Houston and, unfortunately, it was many trips there for awhile. They seem to be more durable and bigger than what you could buy around here. Plus, supposily, they were already made from recycled materials. On the bag itself it says "I used to be a plastic bottle" which the wife and I thought was kinda cool. And they were only $1. We got enough to supply both our daughters with them too.
But regardless where they come from everybody needs to have and use reusable bags. I also think the stores should offer discounts, coupons, and such as an incentive for more people to use them.
Another great reusable bag is the Paper Nor Plastic one. I've used mine for over four yearsand they are super strong. They make a great statement and I get compliments on the bag everywhere I go. As stated in the article, they are great for camping, to the beach.....just about anywhere. Check out www.PaperNorPlastic.com