if it’s just a bin, you’re gonna get all kinds of stuff regardless of what the sign on it says.
and also remember you need a way to send ‘up the chain’ or properly dispose of everything you don’t repurpose, recycle, or use yourself, including all the literal junk and potentially dangerous items like cathode ray tubes, spicy pillows and batteries of all sorts, and vape pens.
(they just may not be the ones you want me working on)