I found this product at the fair in Lyon. This is a great innovation: very easy to put on bags, suitable for all types and sizes of bags, really tight, goes to the freezer, do not take up space when not used, and the bags are easier to store. In short almost perfect except a little expensive. So there, that's all perfect: the same product with all its qualities and a lot cheaper. In addition it is the right amount, because we want to everywhere. Once we know them, we can not do without.
