A printing fluid container for a printing fluid source for a printer system, wherein the printing fluid container comprises a sealing material layer being arranged in a closure device printing fluid outlet opening, the sealing material layer having a fluid outlet condition, in which the sealing material layer is pierced by engagement of a fluidic interconnect device of the printing fluid source and the closure device printing fluid outlet opening, as well as a printing fluid source, a printer system, a printer system arrangement and a method of filling a printing fluid source.