Fragrance oil in a 10 ml glass bottle with dropper installed. Easy way to test candle and wax melt fragrances to see which ones you like or would like to add to your lineup. We recommend using a q-tip to put the drops of fragrance oil on top smell. You can also just turn the bottle upside down to allow the fragrance oil to drip out of the bottle to smell. If you want to make products to test, then you can purchase the 1oz, 4oz, or 16oz fragrance oils from their respective listings.