If you look at this from a Herbalist Point, How about Herbalist Pouch, The herbalist pouch can only be used for Herbs, this pouch adds in a Grid that the items snap to. Also Having a Herbalist Shelf with the same qualities would be great.
Also for this there can be a second tier pouch for this Idea, which would be the Alchemist Pouch which does the same thing, but it is a bit bigger and can hold Herbs and Catalysts, (mineral and Organic)