Would you drink water from a toilet? Check out a safe way to do that.

 
A man dying of thirst would drink any kind of water. The 22cm-long LifeStraw was originally developed by Danish manufacturers in 2005 as a solution to the devastating problem of unsafe drinking water in the Third World, where one child dies every 15 seconds as a result of drinking dirty water.

That year it was named Best Invention of 2005 by Time Magazine and Invention of the Century by Gizmag, and in 2006 it was heralded by the New York Times as 'a water purifier that could save lives'. Forbes Magazine called it 'one of the ten things that will change the way we live'.
The straw's powerful purification pipe removes 99.9999 per cent of water-borne bacteria plus many other parasites, including E-coli, campylobacter, vibrio cholerae, pseudomonas aeruginosa, shigella and salmonella.
And it will safely filter at least 1000 litres of water. (There are only about 13 in your toilet cistern, so plenty to go around.) 

Necessity, they say, is the mother of invention. :-)