I think it is quite well known that in the case of a can of Coca Cola, the can itself is more expensive to make than its contents. Geez, what a waste of resources.

Treehugger now delivers a thorough analysis of the True Cost of Bottled Water:

In summary, the manufacture and transport of that one kilogram bottle of Fiji water consumed 26.88 kilograms of water (7.1 gallons) .849 Kilograms of fossil fuel (one litre or .26 gal) and emitted 562 grams of Greenhouse Gases (1.2 pounds).

This is heavy stuff for ecologically minded people and the original document on Triple Pundit is very well a thorough read.