The present invention relates to the production of pig-fat substitutes that comprise a mixture of at least two of the following oils: palm oil and at least one of the following polyunsaturated andor monounsaturated oils, namely sunflower andor safflower oil, canola, soya, olive and high oleic sunflower andor high oleic safflower oil. The method includes producing optimized prices for products for sale. Here, the shared area of the RAM in which the instruction data is stored can be recognized by a personal computer connected to the multifunction device as a storage area that can be accessed through the file system, which is a function provided as a standard feature of the operating system. Each pouch includes front and rear panels that are formed using either a right-side template or a left-side template and is interchangeable with any other pouch designed using the same template. In one embodiment, the pressure relief valve is constituted by a check ball which is displaced by a pressure build up in the filter chamber. At least one of the pair of metal foils has a twist structure.