The CNG cylinders, (Compressed Natural Gas cylinders) will be distributed by the gas distributor to test for the acceptance of biogas as an alternative fuel for commercial cooking and similar applications. The bottles have to be easy to use and practical for transportation and distribution. The bottles shall be re-usable, low leaks and maintenance, and so that the number of end-users later,can be increased. Part of output I is the demonstration that the desired quantity of bio-methane is produced, with respecting quality, burning efficiency and reliable production. Another element of output I is the demonstration that the bottling system will runs as designed, and that no major issues are encountered during production and bottling.