I relied on reputable KRUPS but I should have read the reviews before ordering this item. I had a soda-sac "PETRA" which I was (almost Apeu) satisfied; I was tempted by the ability to make smaller portions and double seal, but I did not suspect that the suction function, although affirmed in manufacturing was illusory because it does not work !!! Jai had good shake the bags and wait ..... as indicated in the instructions, it nothing happens. it would be false advertising ...