Future History: Plastic Water Bottles

This short (2 minute) video from KQED images a time far in the future where athropologists are trying to determine what our civilization used "sacred vessels" for - they must have been important because we used so many of them, but what could they have contained. The future anthropologists pretty much discounted the theory that it might be water, since:

• we already had water piped into our homes and businesses
• and ...
  
  To manufacture one plastic bottle takes
  1/4 bottle of petroleum plus 3 bottles of water

Source: KQED