Here is something I have been looking at for smaller kits:



But I really like the widemouth Klean Kanteens for larger kits. Here is a blog post I did. At the time I was using the narrow mouth models which didnt work as well for survival kits but work great for a water bottle and improvised boiling solution.

http://austereprovisions.blogspot.com/2010/01/aqua-est-vita.html