That is bad construction, add a foam layer over the compartments and problem is solved.
As I write this I see that this community is about aincent coins, and I can understand that foam might cause a chemical reaction with different metals, but why this is even an issue when the solution is simple I have no idea
Yeah, but the foam is still a petrolium product that can off gas stuff that might harm the metal, better to go with normal fillings like cotton or similar
I have a set of tools, sockets, that is like this. I took a piece of cardboard and use it as an insert to prevent this kind of mess. I agree with others, this is just bad design.
There are seven or eight trays, this is the top one and the only one with the issue. Well, some of the small Greek ones are also messed up, but they're like... 7mm wide and super thin, so you can sort of forgive that.
But sure, if I'd bought a proper abafil coin case it'd not be an issue, but I was cheap.