Secrets No More - from official website

Why do they add alcohol in your perfumes? Alcohol has a low evaporating point so it dries quicker than water. Hence mixing perfume oil with alcohol causes the oil to evaporate faster than they would by themselves. This gives the impression that the perfume is considerably stronger than it actually is. That is why, when you first put on a commercial fragrance, the aroma may sometimes seem overwhelming to those around you. This also explains why the scent fades dramatically within one or two hours as the perfume oil evaporates along with the alcohol.

The second reason for all those fillers is just clever marketing -- a bigger and fancier  bottle containing fragrance plus fillers seems like a much better value than a smaller simple packaging of pure perfume oil.

What's the problem with alcohol anyway? Alcohol tends to kill off or mask some of the subtle notes in many fragrances. Ethyl alcohol is the most popular alcohol found in ordinary perfumes. It is extremely caustic. Many people who think they are allergic to the perfumes are actually allergic to the alcohol added in the perfume. Alcohol is a drying agent - it makes things evaporate including the fragrance and your natural body oils. Alcohol also is a forbidden substance to be associated with the Muslim users.

How long do One Drop Perfumes last? A well-established fact is that oil based perfumes do not evaporate quickly and will settle on the skin for much longer, causing the scent to linger for a longer period of time. The oil-based One Drop Perfumes last up to 12 to 24 hours - depending on your body chemistry.  If you apply the fragrance on your clothing, the scent will last throughout the day as it permeates into the fabric of your clothing.

Hence it is no gimmick when claim you will smell great throughout the day with only one drop of our fragrance oil.