Premium Quality: Longer than other brands in the market to prevent wasting oils and thicker to prevent breaking easily. UV Resistant: Corrosion-resistant frosted glass bottle with clear glass to protect oils from UV rays and evaporation. Perfect for Aromatherapy: Set of 4 droppers for blending essential oils for massage, hair salon, aromatherapy. Leakproof Design: Screw thread finish bottle mouth with silver plated cap fits tightly to prevent leakage. Additional Accessories: Funnel and stickers included to refill and label essential oils for organization.