Orange Vanilla Trapp Diffuser Refill No. 4 Orange Vanilla - 8oz. Reed Diffuser Refill: This is it! The perfect combination of crisp orange notes elevated by the exquisite addition of Tahitian vanilla. Trapp Reed Diffusers are a perfect complement to your candles and can be used in any room of your home all-day, everyday. Our reed diffusers are specially formulated to fill your home with the fragrances you love. Refill includes: 8oz. Diffuser fluid Lasts approximately 3 months