This is the BottleCamo, and it blends right in to a normal bottle. Instead of filling it with water, you can stash your libations in here, while going unnoticed.

It's lined with a quarter inch layer of neoprene and its creators claim it makes it 40 percent more efficient at keeping a bottle cool compared to a standard koozie. 

Check out the video demo of it in action: [BottleCamo via Thrillist]