I agree. It is an excellent antidote to being caught off guard or rattled by an unexpected calamitous turn of events. It helps raise morale, especially when cold, wet and maybe a bit shocky, and allows a little time to settle the nerves, think through the situation, and plan an effective course of action. Also, even if the owner doesn't need it, it's still a means of effective psychological first aid that can be offered to someone else who does.

One of the best pieces of disaster/survival advice I ever heard was "don't just do something, sit there!" Our most important survival tool is our brain, and our most important survival preparation is a good plan. But these usually need just a little time to become fully operative.

In addition to the boiling cup, might it be worth adding a tiny 1 oz. home-made or Trangia alcohol burner and a small plastic bottle of denatured alcohol (which has multiple uses)?