Musket Ball Candy is a liquorice flavoured hard candy (don't bite the bullet!).  As it is savoured, it will tend to change colours.  According to the Redpath Sugar Museum, it actually has a basis in history:  soldiers in the British Army, serving in the Caribbean Islands during the Napoleonic Wars, made a candy mixtuture of ginger and molasses in their musket ball moulds, to relieve the dryness in the mouth associated with the actions of firing black powder weapons!  Sold in packs of 4 (6 balls to a pack).