Sachet

Although its most usual definition is that listed under "packet" (see link above), a sachet /ˈsæʃeɪ/ can also mean a small scented cloth bag filled with herbs, potpourri, or aromatic ingredients;[1][2] 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.

[3] During the Chinese Warring States period a scented sachet (xiangbao) was an ornament worn on the body and used to absorb sweat, repel insects and ward off evils.

In medieval Europe the sachet was known as a "plague-bag".

[4] In various Indian cuisines, a "potli bag" is used to contain whole spices, so that they may be easily separated from the food after cooking.

They are also used as fashion ornaments unto themselves.