Very disappointed with this feeder. They need to add a rubber gasket at the end of the plunger to hold the suction. Plastic upon plastic just does not hold up to fill and dispense the formula. Nice size , easy to read, Just lost suction for filling and dispensing formula after less then 5 uses. Your better off looking at the syringes with the rubber gaskets and adding a pet nipple to the end of syringe or a tube feeder cut to size needed.