IN RESPONSE TO:
have you considered a bark river Mikro or Mikro II?
This is its size relative to the altoids tin. It would have no problem fitting into a japanese lunch box or bcb tin or trangia mini mess tin.
Don't you think that's a little expensive for a PSK kinfe, because on the site I found it on it was like $77? But then again, you can't put a price on something that could save your life.