The cleaning is quite simple, they are holding, even after many dishwasher corridors and the rubber seal can be taken out and extra clean, so nothing to fix there.
The only tiny downside is that boxes of the same size not properly are stackable, so you need a little space in the kitchen cabinet, if the number of boxes increases gradually.
For me, there are so far the safest and most densely boxes that I know. Therefore, a strong buy recommendation!
