In my daypack I've usually got my .7L titanium cup, a couple of tea bags, a pack of sugar, some candy and a granola bar. I might add a Thai Kitchen pack of rice noodles (weighs nothing). I figure if I'm stuck out unexpectedly I can heat up a cup of my favorite tea and plan my next move. Unecessary? Probably. But it gives me comfort, a plan, and reminds me to STOP (Stop Think Observe Plan) should the situation arise.