Why Vapo Rub?
Would a Heatsheets or something similar make sense? And a small flashlight?
Vapo Rub is one of them "cure alls" that I like the tin is small enough and cheap enough. Any form of space blanket takes up way to much space in the small can and I believe during the winter I would Keep a Heatsheetz in my pocket where I know it would constantly be with me survival kit or not. And yes I just added a little Solar powerd keychain light to the kit.
2 cigars? I would replace with a Clif or Tanka bar and a tea bag or two. Personal preference, I guess.
Would bring water to a rolling boil deal with the lining?
As with the Space blanket any form of food bars or such are to big and would increase the size restraints for most the needed items. And I do not think Boiling water would melt off the liner.