Although its most usual definition is that listed under "packet", a sachet can also mean a small scented cloth bag filled with herbs, potpourri, or aromatic ingredients; or a small porous bag or packet containing a material intended to interact with its atmosphere; for example, desiccants are usually packed in sachets which are then placed in larger packages.

A packet or sachet is a small bag or pouch, made from paper, foil, plastic film or another type of packing material, often used to contain single-use quantities of foods or consumer goods such as ketchup or shampoo. Packets are commonly opened by making a small rip or tear in part of the package, and then squeezing out the contents.