I have two wonderful canvas bags I take with me for grocery shopping. This is because I don't want, need, or deserve a million bags sitting around in my little teeny apartment. These bags are pretty damn strong. They will not break. That being said, oh bagger, please do put more in a bag than a head of cauliflower and a little piece of broccoli. Gah! You could put five times that amount in a flimsy ol' plastic bag. And when the canvas bags fill up, sometimes I do like plastic; it was nice of you to ask. However, there is really no reason for you to double or triple bag everything.