Wait! Don't throw away or recycle that plastic...you can make gorgeous modern planters for your garden using them as molds!
Time: 2 Hours Cost: $20 Difficulty: Easy
First things first, collect those plastic containers in different shapes and sizes. Oil the well with cooking oil...to make sure the concrete doesn't stick.
Use more containers to make the holes in them for the plants (don't forget to oil the outside of those containers though!)
Voila! Cool modern planters. You can use a concrete drill bit to drill a hole in the bottom for drainage.