Inside every properly functioning electronic device is a bunch of tiny aliens/robots ensuring optimal transfer of electrons and other tech stuff. Inside this bottle is [ideally] a bunch of water that ensures proper function of your body and other health stuff.

The aubergine colour of the bottle is more transparent than it appears in the photo. 

Fourth Edition Ninetimes Nalgenes.

Art by our longtime friend, Daniel Beanmash (@beanmash).