NEST Fragrances Reed Diffuser- Birchwood Pine, 5.9 fl oz Reed Diffuser 175 mL / 5.9 Oz. NEST Fragrances Birchwood Pine Reed Diffuser creates the aroma of a majestic winter forest by blending white pine, fir balsam and Birchwood over a base of rich musk and amber. The glass vessel are designed to compliment the beauty of its surroundings; the classic shape and modern stripe etching will complement any dcor. The alcohol-free formula releases fragrance slowly and evenly into the air for approximately 90 days.