US Patent 10352749 Continuous volume measurement on a receptacle for liquids

The present invention is about a volume-measuring device installed inside a box that used to store a liquid. The measuring device is placed at the bottom of the box dispensing the liquid, and displays via a measuring tower a measure of the volume of the liquid still in the box. The device is comprised of a receptacle or sealed pouch connected to a measuring tower. As the pressure from the weight of the liquid changes, the receptacle reacts by moving the measuring marker to reflect such change, thus measuring the current liquid volume in the dispensing box.