This reed diffuser set includes a 250 ml clear spherical clear round glass bottle measuring 11" circumference, 1.75" base diameter and 4" in height, an amber colored 4 oz. glass bottle filled with 4 oz's. of the finest/purest carrier oil (clear diffuser liquid base) and fragrance oils (depending on the fragrance oils, some liquids will be either clear or yellowish in color). (8) 12" diffuser reeds, and multi-colored river rock stones (size, shape and weight varies). Doily (pictured) is for display only and is not included. There are many factors that contribute to how long the fragrance oils last. Air conditioning, heating, closed and open doors, dehumidifiers and etc. Approximately 3-4 months, but will depend on your room conditions. Diffusers work really well in places where you always want it to smell nice but can't keep an eye on a burning candle or places where candle burning is prohibited. *****SCENTS***** Autumn Harvest (Phthalate Free) - Spicy blend of cinnamon and clove. Cabernet (Phthalate Free) - Sweet aroma of ripened wild grapes with notes of strawberries and sweet sugar. Coconut Hibiscus (Phthalate Free) - A beautiful fragrance with the scents of hibiscus, violet, peony, vanilla and coconut. A fruit floral blend. Cool Waters - This fragrance is an imitation of the men's cologne. A refreshing , spicy, lavender, amber fragrance with jasmine, oakmoss, musk and sandalwood. Eucalyptus Mint (Phthalate Free) - A refreshing blend of eucalyptus, mint, lavender, lily, rose and added spice clove, cinnamon and sweet vanilla makes this the fragrance of relaxation. Jamaican Bay Rum (Phthalate Free) - A fresh tropical concoction with ripe notes of peach, papaya and mango. Lavender Basil (Phthalate Free) - Lavender Basil has more of a light floral fragrance with a touch of basil and not really a herbal lavender scent. Washed Linen (Phthalate Free) - A clean fresh laundry scent. INSTRUCTIONS WHEN USING REED DIFFUSERS. Place the multi-colored river rock stones into the clear round glass bottle. Pour the contents (amber bottle) into the clear round glass bottle. Place the reeds that came with your reed diffuser into the clear round glass bottle to absorb the diffuser/fragrance oils. Flip reeds so that the saturated end is in the air. You can flip one reed or all the reeds over, this will cause the oil to evaporate a little quicker. The diffuser reeds soak up the fragrance oil which allows it to evaporate into the air. Diffusers will allow the room to smell nice but won't necessarily fill the room with fragrance. Let your reed diffuser naturally fill your space with fragrance. Leaving it near a door so you can get the smell as you walk into the room, or in a high traffic area such as a hallway so the air circulation will allow the scent to travel. Reed diffusers will continue to evaporate into the air, creating a subtle and luxurious scent. HELPFUL HINTS WHEN USING REED DIFFUSERS. Flip reeds for more scent - If you want to increase the scent, just flip one or several reeds. Less reeds mean less scent - In small spaces, like bathrooms, use less reeds. Flip reeds or swirl the liquid around whenever you notice the scent fading a bit or want an extra burst of fragrance. You should flip the reeds about once per week. SAFETY RECOMMENDATIONS FOR REED DIFFUSERS. Do not ingest oils. Use caution when filling your bottles with oils or flipping your reeds as oils can damage some surfaces. Do not place the diffuser directly onto polished, painted, plastic or leather surfaces or on electrical equipment, as spillage may cause damage to certain materials Diffuser fragrance oils are flammable, do not light reeds and keep away from open flames. Be careful not to tip over the diffuser. Keep out of reach of children and pets. People suffering from perfume sensitivity should be cautious when using this product. Use gloves when handling used reeds.