a molded , thermoplastic container having a pressure dome section in an end wall to permit the container to hold pressurized fluids . an integral dispensing spout may be provided which preferably is collapsible to nest within the container , and having sanitary seal means over the spout . an annular ring structure around the pressure dome section may be provided to permit the container to stand on an end during filling and storage . method and apparatus are included for forming the pressure dome section in a previously molded thermoplastic end wall , for collapsing a dispensing spout to a nested position within the container , and for pressure testing the container .