There are two ways you can purchase flower essences; you can purchase a stock concentrate bottle (30ml) to dilute yourself, or you can buy a dosage bottle (20ml) which has already been diluted and is ready for use. When buying a pre-diluted dosage bottle, you can either select a single flower essence or combine several essences together. You can select up to seven essences to combine, however the more precisely you can pinpoint the issue you want to address and the appropriate essences to use, the better.