Camelback have recently released a new reusable water bottle that has a built-in purification! I think this is the first of its kind. Bobble make a water bottle with a built-in filter, but not purifier. It’s only available in the US at the moment. It’ll be great to see some reviews on this water bottle. Definitely great for adventure travellers!
http://www.camelbak.com/Sports-Recreation/Bottles/2012-All-Clear.aspx
If anyone has any information on this water bottle, please post a comment! I read it’s no good with boiling water.