Purpose of the whole technology are actually hoped for savings effects: food should last longer, which can use their own wallet, but also as it were the private life cycle assessment can improve a bit again, because one pollutes the environment less etc. etc. ...;: )
With these bags, these objects are, however, more misses. In addition, that is bought with a significant added at the time that it takes for the stowing of food - if it even works. We anyway have failed at every second bag, the bag to close so that the vacuuming may also occur - and already threatens our life cycle assessment again to tilt negatively ...
Moreover: since the closure principles requires is relatively fixed, it takes significantly more space in the fridge / freezer as with packaging that conform to the flexible product to be cooled in the mold. For larger deep satis-saving food, we continue to use a vacuum sealer of Caso - much faster and as a result less space, but also, unfortunately, much more expensive.
Conclusion: the bag of this size had a bad buy for us. The in size 22 x 21 on the other hand we feel as practical because the vacuuming quickly goes here by the hand and the bag can also be well put in refrigerator drawers and freezer compartments.