I already have the 1 and 2 cup sizes. They are great. I ordered these because I am getting lazy and don't want to walk back to the water cooler to fill the 2 cup size up again. Not really. Saves time when you are in the middle of a recipe. Also, they actually work the way they say they do. Fill it as you look down at it and you will get whatever amount you are looking for. Great product.