Some people are seriously serious about where their coffee comes from. No question of provenance when you grow it yourself!
Be your own miniature urban improvement league.
Ingenious! When the squirrel in his hole is hiding you'll know the plant in the top needs more water. Then the squirrel will be all kinds of welcoming.
Intimidate your plants into staying alive when you leave town for a weekend.
Available at: Perpetual Kid http://www.perpetualkid.com/power-planter.aspx ($16)
A live plant can be a great, chic accessory and a handy oxygen generator right under your nose!
My plants would be happier with a piggie friend for when I'm not around.