Originally Posted by cpaharley2008
Good point, Jim - even a pressure cooker has a set pressure, and will
release steam and air to avoid exceeding that pressure. Unless that set pressure is exceeded, nothing comes out.
With an open vent hole, the Can Cooker is a zero-pressure pot... like any pot with a lid. Of course, some pots have nicer-fitting lids than others, and some are shaped better for steaming than others; the Can Cooker is designed for closed steam cooking.