yes, but I usually don't carry sardines' cans during hikes..., just because you have to take the empty can back..... messy ...

Dehydrated soup base, ramen noodles, home made jerky .... easy to get or make. No empties to bring back.

It's also easy to buy raisins, peanuts and cashew nuts.... I could live a few days on those alone.... <img src="/images/graemlins/wink.gif" alt="" />
(OK, that's not survival, but greediness.... <img src="/images/graemlins/blush.gif" alt="" />