100% Oregano Essential Oil
This oregano essential oil is a product of Spain.
It is packaged in blue glass to preserve its integrity and has a dripper within the bottle so you can easily get a few drops of this potent essential oil, without overdoing it.
Bear in mind that essential oils are highly concentrated, and therefore only a 1-3 drops in 250ml of water is plenty.
Oregano essential oil (as for all essential oils) should not be ingested.
Some Links to Research into Oregano Essential Oil