Sachet n. : A scent bag, or perfume cushion, to be laid among handkerchiefs, garments, etc., to perfume them.

Example:
How does one mail a rose potpourri Sachet across the US?

Taxonomy
sachet, free encyclopedia, shampoo, company, search, 15th century, diminutive, sac, shay, single-use, quantities, consumer goods, ketchup, fabric, detergents, the Philippines, India, Eastern countries.

Defination from the web:
sachet (pronounced sa-shay) is a small disposable bag, often used to contain single-use quantities of consumer goods, such as ketchup ... In culinary terms, a culinary sachet is a small cloth bag made of cheesecloth, containing various herbs and spices (typically bay leaf, thyme, ...