Posted: 08/11/2012 at 08:06
The key is your variety of bamboo. As above, if it's non-invasive, you don't need to worry about a pot to contain it. If invasive, though, a pot won't contain it. The roots will be out through the drainage holes and off or even up the sides of the pot and out and off.
I speak from bitter experience. I once inherited a garden in which a bright spark of a landscape designer buried an old laundry trough and planted an invasive variety. He left the plug in the trough, he said, to stop it spreading through the plug hole. The roots ran up the sides of the trough and out and off. A nightmare.