yup. my mum has loads of them for when we go shopping. They hold alot, and they can take alot of weight (although I don't think I can. XD). So I sometimes use it to carry my P.E. Kit or my wellington Boots (when I do gardening). I see quite a few people using them, which is really good, and Waitrose give everyone the chance to buy some. I don't know if any ther supermarkets do this.
I would put on this post, how many there are in my house but I think there might be too many too count. 
~Diddimonster~