Collecting scent bottles is a great avenue to go down. There are two types of bottles to collect. The decorative bottle and the commercial bottle.
Decorative bottles include any bottles sold empty and then filled with a scent of your choice. Commercial bottles are any bottles that are sold already filled with scent and have the label of a perfume company.
The most popular types of decorative bottles include ancient Roman or Egyptian bottles, bottles by famous glassmakers such as Webb and Lalique and porcelain bottles from the 18th and 19th century.
Popular commercial bottles include bottles by a single perfumer such as Guerlain, bottles by fashion designers such as Jean Paul Gaultier, giant factice bottles which are store displays not filled with genuine perfume, tester bottles and miniature perfume bottles which are usually replicas of regular bottles given as free samples.
In 2009, an empty Yves Saint Laurent perfume bottle sold for €8.9 million at Christie’s Paris. The bottle “Belle Haleine Eau de Voilette“ never actually contain perfume. It was designed by Marcel Duchamp in 1921.
Check out the video below which I found. The owner of Quirky Finds which specializes in vintage & discontinued perfume/cologne bottles, speaks about collecting scent bottles.