In all seriousness...I pack crumble-able goodies in recycled stiff plastic like a pringles tube or wide mouth jar (Miracle Whip or trail mix container, etc.) Burn the empty container or carry it, using it for other small items or food leftovers.
I once taped the corn chip bags into the very pointy end of my kayak, carried them that way until I wanted them (portages and all...they don't weigh anything) and they remained in great condition.