I’ve used this twice now. First time I mustn’t have done it up tight enough and almost had a major disaster. Just finished using it for the second time and it was great! Obviously you can sift huge amounts at once but I just sifted 2.5 cups of flour and 3/4 cup of icing sugar with ease. Takes a little while but I now no longer have aching hands (I’ve had surgery so sifting was always a very painful task). Well worth it if you hate sifting!!