TerraCycle is a product that could be called completely Metaefficient.
It is a liquid fertilizer produced through vermicomposting, or feeding organic waste to red worms. The worms’ excrement is a nutrient rich compost that can be mixed to produce liquid organic fertilizer.
The TerraCycle bottles are recycled soda bottled collected by students in elementary schools, and the trigger sprays are collected from large corporation who normally discard them.
TerraCycle also sells a hydroponics fertilizer in a larger bottle.