So my Uncle used to have an allotment with chickens (and two ducks!). This isn’t apocryphal this is a thing that was.
Every morning he’d walk to the allotment, less than a mile, with a big open topped plastic box, collect the eggs and walk back to put them into individual egg boxes for sale, or more often distribution around the family.
This method was great because it meant he could use a good solid box (a type of, admittedly modernised, basket if you will). He knew the characteristics of it. He knew how strong the handles were, he knew where to put the eggs so it was balanced for the walk back, he knew it was water resistant so the bottom wouldn’t fall out.
It was the obvious solution.
A less useful solution would be to use lots of baskets from lots of different places, put a few eggs in each basket then try to walk back. They’d be hard to manage and at some point the worst basket will break, you’re going to try to catch its eggs and drop all of the rest.
Maybe down in that-there London they don’t have allotments or chickens and eggs only come from Waitrose which might be why security product vendors seem to think “putting all of your eggs in one basket” actually means the opposite of what it really means if you stop and think about it for a minute. And why when they say it they are, quite unintentionally, completely accurate.
