I think I have every powder measure in this thread, save the test-tube style shown by the OP.
That’s the mixed blessing/curse of black powder shooting- it seems like there are endless “rabbit holes” to go down!
Everyone tends to develop their favorites. For range use, I like:
-an adjustable powder measure
-an attached funnel
-something to “strike off” the measure (i.e., the attached funnel)
-a clear body (reveals partial charges from “powder bridging”)
The T/C U-View is my personal favorite, for the range.
It has:
-all of the above features
-precise markings
-precise adjustment
-a “solid” or “quality” feel to it (especially for “cheap plastic!”)
It’s basically the same as the favorite of ElDiablo and fishdfly, above. The primary difference is that it’s clear.
With a measure like the OP’s, I am tempted to “tap” it with a finger, or to “shake” it, to level out the powder and read the measure. That just introduces another variable. Not necessarily a deal breaker, just be aware and try to do it the same way every time, as much as practical.
For use in the hunting fields, I like a fixed measure or (batter yet) capped tubes containing pre-measured powder charges. Quick, easy, precise!