Refuse - can't always, nearly everything comes from a factory in plastic containers!
Recycle - sure, but you don't know whether it actually is recycled, or at what cost.
Reuse - Bingo!
RamblyLI - You don't have to drill holes in the bottom, but the holes will help with drainage or if you plan to water from the bottom (by sitting the pots in a tray of water) you will need them. You could also just cut a few holes in the bottom with a razor.
