Abstract: A container 10 for use in holding and dispensing soft drink material comprises a cylindrical body (12), a key valve (34), and a pressure relief valve (28). The cylindrical body (12) is of a type which has been commercially used by the soda beverage industry in the past and has been retrofitted by installation of the valve (34) and the pressure relief valve (28). The valve (34) is a single key or tap valve such as employed by the beer industry, and operates to simultaneously withdraw the soft drink material and introduce carbon dioxide. The pressure relief valve (28) includes a tube (100) with a passageway (114), a coil spring (104), and a ball (102). When pressure in the cavity exceeds a selected threshold amount, the biasing of the spring (104) is overcome to open the passageway (114) and thereby release pressure along a path of fluid communication.