I just love these rarities

The first thing that came to my mind when seeing those earliest wooden flasks (post 1, top images) was that it was a quiver, but this would only be possible for the left one, the other three are to small (the left one maybe also).
The lead powder flask puzzled me as well, but i was thinking.. might it be some sort of weight to keep the bandolier in place? It could get quit anoying if such a thing kept moving around.. just something that i thoughed of