Just parking a picture of the Omani gunpowder container shaped like a new moon ...slung around the back of the neck to enable dashing through the thorn bushes activity ...

These days on a decorative silvered chain or stitched into a leather strap and before on a simpler leather strap. Actually worn as a decoration these days.
See also |
http://www.vikingsword.com/vb/showthread.php?t=6081 for other accoutrements ..