These bags are great for portion control. I put fresh strawberries that I had cut up and then portioned them out to mix into my protein shakes. Since the strawberries are frozen I don't have to add ice. I have only just used these once, but I can see where they will make portion control quick and easy. You can fill both sides and seal at the same time.
Since buying Food Saver and the Bags and Rolls to use, I would recommend these products over anything on the market today. I've cut down the waste of money of throwing out frozen foods because of freezer burns. They are easy to use and it also can be used for items for storage that are non-food related. I love this product.