A charcoal canister stores and purges the fuel vapor in the fuel tank. It's not a mandatory part, you can run your car without it but you will lose gas mileage and output more emissions.
Do whatever you want with it, I really don't pay too much attention to mundane car parts that really have no effect on how the car runs and drives. I spend most of my time and energy where it matters, like the head gasket, timing belt, ignition timing and the turbo......
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