If you don’t have enough place to have a big herbs garden, you should inspire you of this smart idea, a suspended herb garden made with reused plastic bottles ! ++ More information at Eline Pellinkhof website !
How to make a Sub-Irrigated Planter. I'm not sure I would use a two liter plastic bottle though. Over time I would fear the plastic breaking down enough to poison the plant. Perhaps a wine bottle instead.