I use those rubbermaid 'Lock & Lock' tupperwares..
love them.. and i got my set of 4 for like 7$, so i don't need some dinky compartments. i can keep my different weedums in separate containers. $15 is a lot to charge for something when you're competing with soo many [often times] "free"/recycled competitors.
like, you're not just competing with other jars and containers other people are selling, but with old mason jars people have lying around in their basement, tupperware and iddish they bought years ago and the like.