How to make a plant in the bottle: Illustration shows cutting the top of one bottle and bottom of the other, taping them together to form a bottom reservoir into which a string dips to provide water to the soil in the upper bottle.
Bottle Bank via Martha Stewart: transform a used plastic bottle into a cute piggy bank. Could use same idea to made little containers for kids to store their collections too (use bottle with wider opening and don't make slot)
Now, THIS is an awesome way to reuse your water bottles!
Make plastic bottles rigid to use as a cloche by forming a reinforcing ring around edge Place cloches over young plants & keep bottle caps off during day to prevent heat build up. Replace caps at night to trap heat and keep plants warm.