Does this compost bin come with charcoal liner?

No, not this style - they are not big enough to need one. These are only 1 gallon - the perfect attractive size to keep on a kitchen counter. Simply empty into an outdoor compost bin every 2-3 days. Charcoal filters are good but ultimately they do not keep flies away if you try to store the kitchen waste more than 4-5 days. Exaco 877-760-8500 ext 701.