Perhaps I’m missing a trick here, but I just don’t see the bloody point in it? The only way I can see that kind of storage being useful is if you take it with you to the supermarket and fill it with loose produce whilst there - so saving on unnecessary packaging from the word go. Otherwise surely you’re just moving stuff from a (recyclable) plastic tray into another container, it’s not actually reducing waste?
plus you have to keep washing the damn containers up! Perhaps I’m being thick.....