system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How to recycling companies filter out any organic or unsafe residue from recycled items?
gpt
Plastic and metals are melted, plastic are typically not reused for food packaging anymore anyway.

Glass bottles that are reused go through vigorous scrubbing with extremely hot water and detergent, and since glass is nonporous there won't be anything left after it's cleaned.