A Reed Diffuser is a great solution for offices, small rooms, or you just want to enjoy fragrance without a flame. Each reed diffuser is a 4 ounce square glass bottle with a replaceable seal. Each bottle comes with its own set of 8 reeds, the more reeds you use the quicker the fragrance will go down. Each diffuser will last 2-3 months and it is suggested you flip the reeds every other week. Avoid ingesting the diffuser solution and keep out of reach from children, may stain wood surfaces if spilled.