Bottles on Trees in MetroTech -- Okay, We're Stumped

We give up guys -- what is it: Art? Science? Homemade barometers? A recycling project? An example of PolyThinking?

Bottles tied together with white string (click on photo to enlarge), filled with either brightly colored or clear liquid, festooned several trees on MetroTech Commons in Downtown Brooklyn.

There's no sign to enlighten us that this is a public art project funded by our tax dollars, yet the uniformity of the bottles makes us think that this was actually planned, not the result of some poor alcoholic flinging his carefully scrounged bottled up in the air.

Anybody?

Photos by MK Metz