Snaggletooth
Member
I don't know if anyone else does it this way but it works for me. When I fill a flask, I use a small funnel. I remove the spout on the flask, Hold the lever back to open the spout port, insert the funnel into the created orfice and pour powder in from a small glass. The small glass that I use equals the volume of the flask so I dont overfill. Works for me.