The powder flasks you can get from Dixie, some local Gun Stores etc are all made in Italy.
They all share the same thread size on the end cap, and you can get measuring tubes for these from 10 grains to over 120 grains and just screw in the one you want.
I have several that I use a lot. A 16, 20, 25, 30, 50, 55, 65, 70, 75, 90 and 120.
I find these great for quick measuring of a powder load.
To use these, after the correct size measure is installed, put your index finger over the end of the measuring tube. Push the gate tab open with your thumb and twist your wrist so the flask is pointing down. A few shakes of your hand and the flask helps the powder to pour into the measuring tube.
Release the thumb pressure from the gate tab to close it and then right the flask.
Pour the powder from the measuring tube into any other measure, and then pour that measures powder into the barrel.
By using this measure transfer method, the 1/2 pound of powder in the flask is never around the muzzle of the gun.
If the powder charge you pour down the barrel fires (from a smoldering ember from the last shot) there is no way it can set off the entire flask and ruin your day.
This whole measuring/pouring procedure takes a lot less time to do than it does to describe.
Although the flasks that look like the original flasks are neat, (I have 5 different ones), the one I use the most is just a brass tube with the measuring gate on one end and a removable cap on the other.
This is very easy to fill (which cannot be said for the "flask" shaped ones), and it is made out of thick brass so dropping it won't damage it. ::