Take a look at these. I just got two in the mail and you can stuff all sorts of stuff in them. I hope to heat water in them this weekend if I get the time to mess with it. I am going to stick one in my wifes bag and one in my bag. I also got the one with the handle which is removable. And they are a lot cheaper than the SIGG containers.

http://www.moosineer.com/moosedetail.asp?ID=4700

Sorry I couldn't get the picture to post.