A teatcup (1) comprises a shell (2), a tubular teatcup liner extending in the shell and a valve housing (4) having a connection pipe connectable to an end (11) of the teatcup liner, a valve housing (4) being arranged to be mounted to the shell (2). The valve housing and the shell comprise locking members (21, 22), which are arranged to engage each other disconnectably during said mounting in order to lock the valve housing to the shell.
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