Pump Oil Or Other Liquid From Heavy Fully Filled Container To The Smaller Container For Daily Use. Kitchen Use, Office Use And Good For Outdoors Also. It Helps To Transfer Liquid Among Two Jars, Fuel Transfer, Liquid Extractor, Watering Balloons, Inflate Toys, Fluids Including Engine Oil, Transmission Fluids, Gear Oil, Coolant, And Brake Fluid In Garage Please Pull The Lever At The Top Of The Pump 20-25 Times Up And Down To Create Vacuum For Pump To Pour Out Liquid