came across this article and thought i should share, heard the rat stuff was 
bad, but never imagined.......
   
  Recent research shows that the tops of soda cans are more contaminated with 
germs and bacteria and than public toilets. 
  As soda cans are stored in warehouses for long periods before arriving at 
your home, they come in contact with many potentially dangerous substances. One 
of the most toxic substances includes rat urine, which, when ingested can 
develop a bacterial disease called Leptospirosis, a bacterial disease that can 
cause kidney damage, meningitis, liver failure, respiratory distress, and 
sometimes death.   Soda can tops are not typically cleaned between the 
warehouse and your home. Be sure that when you bring home your next case of 
soda, you thoroughly wash with warm soap and water the tops of all soda cans 
before putting them in to your mouth or pouring your soda into a glass. 

                
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