The invention refers to a teatcup liner device for a teatcup (1). The teatcup liner device is arranged to be disposed in a teatcup shell (2) of the teatcup in such a way that a pulsation chamber (4) is formed between the teatcup liner device and the teatcup shell. The teatcup liner device comprises a teatcup liner (3), defining an inner space (6) and comprising an upper end portion (7), with an inlet passage (9) extending to the inner space, and a lower end portion (8). The teatcup liner (3) is arranged to receive a teat, which extends through the inlet passage into the inner space. The lower end portion (8) of the teatcup liner forms two outlet passages (10, 11) which extend from the inner space (6) and are arranged to discharge milk from the inner space. The invention also refers to a mould and a method for manufacturing a teatcup liner.
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