Depending on where you live you may be able to find 15 ml bottles of various essential oils in a drug or grocery store. Check the aromatherapy, health and beauty, and atural products departments. Or if it's easier you can buy from the manufacutrers on line - Aura Cacia, Nature's Alchemy, Eden Botanicals. Most can be diluted about 10 to 1 with vodka to make a simple cologne in the flavor you like. Dilution will sometimes change the smell. My favorite example is Ylang Ylang which smells medicinal at full strength and fruity-floral when diluted.