Courtneys Candles Porcelain - Ceramic - Reed Diffuser Refills come in over 200 fragrances and feature the highest possible fragrance content. Courtneys Candles Porcelain - Ceramic - Reed Diffuser Refills are specially formulated to work great in: Porcelain Diffusers (like Zodax) Ceramic Diffusers (like Millefiori Milano, Scentier & Courtneys) Traditional Reed Diffusers Each bottle contains approximately 16 fluid ounces or about 480 ml of reed diffuser fragrance. Designed to slowly evaporate and continuously fragrance your room over a period of months. Never any flame. NOT FOR USE IN CATALYTIC FRAGRANCE LAMPS CANNOT BE SHIPPED TO CALIFORNIA DUE TO CALIFORNIA AIR RESOURCES BOARD RESTRICTIONS ON FRAGRANCE CONTENT