I keep three Chico bags in my purse. They're the same basic idea (the bags fold up into a tiny, attached bag with a carabiner for clipping to belt loops) with a slightly less attractive design. However, they are fair-trade; can hold more groceries that I can comfortably carry; go through the washer and dryer with ease; and they'll recycle them when you're done. They have been everything I've ever wanted out of a reusable bag - I also searched for one that was easy to have with me at all times - and I picked mine all up for only $5 each. I probably sound like a shill, but I honestly don't remember the last time I picked up something that fulfilled so many basic needs while truly exceeding the expectations I had when I bought it. Here's their site: www.chicobag.com.