These make your home or office smell truly wonderful. Available in two sizes (1oz and 3oz) and several scents, we love these diffusers! A simple yet elegant recycled glass bottle filled with natural stones, pure essential oils and packaged with several reeds for diffusing the scent. 100% alcohol free and glycol free, no synthetic oils, only pure plant oils. Simply turn reeds for a burst of fresh scent. Large diffusers last approximately 6 to 8 months, small approximately 3 to 4 months.