Abstract: A method and system for automatic filling are provided. The system includes a drive assembly and a source of bladders to be filled wherein the bladders are joined in serial arrangement to a feeding web. The web is configured to be moved through the system using the drive assembly. The system further includes a nozzle configured to receive a flow of filling fluid and direct the flow of fluid into each bladder in turn and a closure device positioned proximate the nozzle wherein the closure device is configured to secure each bladder when filled such that each bladder remains filled after discharge from the system. The system also includes a trigger assembly configured to activate the closure device at a predetermined level of filling of each bladder.