I had been using veg saver bags to extend the life of carrots, celery, cabbage and so on. They did work quite well, but got weaker over time and I used the last one early last week. Without them stuff would soon go floppy and need throwing.... I needed something else.
I don't have that horrible clingfilm stuff - it makes things sweat - so I tried kitchen foil. What a revelation! Crisp veg 10 days old and still going strong, almost as good as the day they were bought!
It's probably an old trick, but I had never heard of it.