Are you discussing synthetic or toad venom? I'm guessing synthetic due to the amount, but could be wrong.
Others probably have better storage methods, but I've found from working with various powders over the years that paper seems to be the easiest way to move the powder from one location to another without it sticking to sides of containers, baggies, measuring devices, etc. So I wrap my powders in paper, then place the paper in airtight baggies and/or vials. Trying to get a small amount of powder out of a glass vial can be a pain...