Peanut butter and tahini sauce are very high in calories and I am searching for a lightweight but safe way to carry some while backpacking. They are soft and oily, so of course I really don't want any leak from the container. But also, I'd avoid a container that is so big and heavy to cancel the advantage of the high calories-to-weight ratio.
I am thinking about sturdy freezer bags (would you recommend any?) that would resist some impact or scratch that may accidentally happen, closed with a clip like this: http://www.ikea.com/us/en/catalog/products/70083252/
but I did not try it yet, so I don't know if it would work and how well, or not. Any reccommendations would be much appreciated. Thanks!