17th century powder flask prop

Printing the hilarious wheellock nerf blaster by CARNYREX I wanted to complete the accesory by a matching powder flask - only to find no suitable model at all (are all pirate/highwaymen/musketeer cosplayers using original ones, or just ignoring that you need to be able to load more than one shot?)

So I looked up some pictures of auctioned originals and drafted one - should be pretty typical 17th century military-grade type.
It is somewhat shrunk compared to original (feel free to scale) and in theory might even actually work - there is even an internal shutter allowing powder load measurement. (Don't try - or strictly at your own risk!)
M4 bolts not included!