I have a big ol' shakey bottle of Watkins cinnamon on my spice rack. And the plain ol' black pepper - awesome.

If they want to do a sales thing, whether it's direct marketing, or their own products... it needs to be a Good Product that People Will Want. With consumables like cosmetics or spices or household cleaners, people have to come back for more. And if the product is good, and you treat your customers well, they'll come back, and bring their friends with them. ;-)