Canning jars work well and stack easily and even without processing them, the lids that you use for processing form an airtight seal just by screwing the bands on tightly.
I have done this with pancake mix, my own dehydrated vegtables (I buy frozen vegtables on sale and place them righ in my dehydrator)as well as small pint jars full of spices (cinimmon, black pepper, crushed red pepper,) and then I use the Tila vacuum jag attachment and throw an ozygen absorber in to boot! I also packed crisco the same way, it should be good for years.