First, please understand that gris gris and honey jars are not apart of Vodou, they are a type of work done in conjure or hoodoo, not Voodoo or Vodou.
Gris gris is a French word which essentially means a charm. This term is used regionally in New Orleans to describe any type of charm, purposes depending on the region.
I suggest doing a search for "honey jar hoodoo conjure" and "mojo bags hoodoo conjure." A few sites I suggest are the luky mojo site, oldstyleconjure, carolina conjure, and the hoodoo foundry.