There are 12 colors in stock. If you choose assorted colors and did not remark what colors you want, we will send you random colors according to what are in stock. If you're looking for a simple yet effective way to enjoy the benefits of essential oils, then look no further than a glass oil burner. Glass oil burners are designed to evenly distribute heat, allowing the essential oils to gently vaporize and release their scent into the air. Simply add water to the bowl at the top of the burner and then add a few drops of your chosen essential oil. Place a lit tealight candle underneath the bowl and wait for the water to start boiling. As the water boils, it will vaporize the essential oils and release their scent into the air..syi