A manual liquid filling machine is a simple device that requires a human operator to dispense liquids into containers. The operator controls the filling process by manually activating the machine, which uses a reservoir for the liquid and a nozzle for pouring into the container. It is a manually operated filling process that requires human intervention to control the filling and uses a foot pedal to activate the machine. 

• Manual operation: Human intervention is required to operate the machine and control the filling process.
• Components: It includes a reservoir or hopper to hold the liquid, a nozzle or spout for dispensing, and a filling mechanism.
• Activation: The operator manually activates the filling process, often using a foot pedal.