Now that China has stopped buying our recycling, I think the odds of a few razor blades being actually processed is about zero (if it wasn't already before.)Any glass or tin is fine as long as you tape it closed and toss in the trash when full. Please don't recycle razor blades. It only endangers the poor sorters making minimum wage.
I was going to buy proper sharps bin as somone showed above, but you aren't allowed to throw them in the regular rubbish here. I guess you could ignore the rule, but it put me off the idea.
My plan was to continue adding blades to my tin money bank and decide a few decades from now when it's full how best to deal with it. But there's only a thin scattering of blades at the bottom and it's already rusting away.
I now like the idea of just blunting them and throwing away in small batches. I wonder how blunt you can get them by rubbing the edges against a glass jar. The problem is they're still nasty thin pieces of steel.