I am taking spent liquor bottles from my personal bar as well as bars around Philadelphia and planting them up as terrariums.
Now I know making a terrarium is something everyone wants to do these days, but really, fitting all the plants through the neck of liquor bottles (without breaking them!) and then using wire to plant them into the soil is actually sort of a daunting task. But I enjoy it. And hopefully people will enjoy them as well.
You can see them at http://www.etsy.com/shop/Ecobota?section_id=7813693