Waterless Diffuser Refill DEEP HARBOR Deep Harbor captures the feeling of weathered driftwood and crisp marine salt air, layered with cool aquatic notes and subtle mineral woods. Clean and refreshing with a darker coastal edge, it evokes open water, windswept decks, and the freedom of being out at sea. MOOD Fresh. Rugged. Coastal. Confident. 8 oz Made in the USA works in most waterless diffuser machines - please test with a small amount if using another brands machine Will fill approximately 1000 square feet. Bottle will last between 4-6 weeks based on running 8 hrs a day at a moderate cycle.