$1.90 each. These bottles feature an inner filter to help againt seapage when shipping. Sell these as a way for your customers to refill all their diffusers. Can be filled with essential oils or fragrance oils. We have customers selling these with fragrance oils as a "fragrance booster" to their candles. We recommend adding 5-8 drops of fragrance oil before the candle is lit. These make a great upsell with our aroma jewelry.