Food will not fresh in a stacked box

This works beautifully in the top Frischhaltedose to which the lid fits. This completes absolutely airtight. Stacks is more of Frischhaltedosen superimposed, so close the lower doses do not completely. The result is that oxygen gets to the food, the sausage will dry and the cheese starts unpleasant.

Furthermore, I have found that the cans be easily forgiven by several Spüldurchgängen the dishwasher so that they fit together then even worse and thus more oxygen to reach the food in the lower tanks.

My Conclusion:
With the knowledge that I have now, I would not buy stackable Frischhaltedosen more, but only those in which each item has its own cover.