I made several "case" dippers for black powder shooting, out off .38 Special and .45 ACP hulls, some cut down.
I used different sizes for powder and corn meal.
They aren't as pretty as yours though! I used brass brazing rod, and bent the handles for comfort after attaching nearer the base.
Now, from your article, I'm inspired to make a whole new batch for loading Nitro-powders.