Our Tub and Pump is designed to be used with our Liquid Egg Whites. Each "pump" deliveries 30ml of liquid, which is equal to one medium egg white. We supply a 3 litre plastic tub with pump attached to the lid of the tub. Please make you clean the tub when adding a new batch of Liquid Egg Whites. It is reusable as it has a screw top lid and 100% food grade.