This budget-friendly diffuser holds 400ml of water and uses ultrasonic technology to diffuse the oils, which helps spread them throughout your space. This diffuser is a great size for any side table or nightstand. With seven different light choices, you can choose the color that best fits your mood. Various timer settings also allow you to run your diffuser for an hour, three hours, or even six hours. This is great for anyone just dipping their toes into essential oil diffusing because there are 10 therapeutic grade essential oils included—try out various combinations to find your favorite blend.