Here are some straws that can be used to drink water from any fresh water source.
This one
http://www.campingsurvival.com/sustcowapusy.html Certified to remove greater than 99.99% of ethylene dibromide (EBD), Destroys greater than 99.99% of microorganisms including E.Coli, cryptosporidium and giardia lambli cysts. And is $24.00
This one,
http://www.bestglide.com/water_purifier_straw_info.html is only $16.00 and gets rid of 96% of the bacteria & viruses.
And the lifestraw,
http://www.engadget.com/2005/08/18/l...nder-2-a-year/
which eliminates 99% of bacteria for under $2.00.
I don't know though, if it is available to the public yet.