Risa:  Excellent work.  Well done.  Next question:  How much energy does it take to ship bottled water all over the world?  Water is heavy.  8.34 pounds per gallon (or 3.78 kilograms) at 62 °F.  Calculate the total number of gallons shipped X an estimated average distance X $_ / mile.   What if that money were invested in clean water in places that do not have it?  What would that do?  Reduce infant mortality from disease among other things.  And we could solve our thirst by simply carrying around our own thermos to fill when we pass a faucet.  By any measure the net cost benefit (including all environmental factors) would be significant.  For more information, see "Bottled and Sold: The Story Behind Our Obsession with Bottled Water," Peter Gleick (2010).  
Good luck with your law career.