In the US at least you can buy refurbished (ie rinsed) pickle bins - which look identical to your blue ones ACM. They are human food grade. And for sure for a while they smell of pickle but personally I like pickles so that isn't a negative for me!I'm still learning.
What sort of bins did you get Marie? I found that the mice/rats were able to gnaw through the lid of a plastic bin.
Luckily I seem to be near a good supplier and all the info from my chicken friends is helping too.
At least now you know what to replace the bins with when they get too old.
I find the tall bins too difficult to maneuver though so in the end I got something smaller and metal and it works well.