If you make venison jerky, and use "Jerky Cure and Seasoning" by Hi Mountain at http://himtnjerky.com (Gander has it also) in the 7.2oz pkg, the shaker container that that comes with it holds a fly nicely and fits in plastic Plano type boxes. However, you do have to make a lot of jerky to accumulate enough containers. not sure if you can purchase containers separately as didn't see them on their website. Empty spice containers work too, but do as Longline said and drill holes in the top.
good luck,
Shawn