This stylish and innovative set of two Flo drizzler flasks, one for oil and the other for vinegar, are by Joseph Joseph. Simply depress the large button on each cap to control the flow - pressing more for thicker liquids, such as oil, and less for thinner, such as vinegar. The flow of liquids can be finely adjusted whilst pouring. The flow of liquids can be finely adjusted while pouring. The dispensers have a silicone coaster for smart, organized storage. All parts are dishwasher safe.