Perfume

[richlevy]

I go through this every mothers day. I get my mom a particular brand. The same fragrance comes in

Parfum - most expensive
Eau de Parfum
Eau de Cologne
Eau de Toillete

So I finally found the answer on the Internet

The dilution factor
The costliest form of fragrance is pure perfume, which contains the highest quantity of essential oils -- generally 22 percent -- and the least amount of alcohol-based fixative.

Perfume is followed in order by:

eau de parfum -- 15 to 22 percent essential oils
eau de toilette -- 8 to 15 percent
cologne or eau de cologne -- 4 percent
eau fraiche -- the most diluted version of scent with just 1 to 3 percent