#$%^&*AU2016256705A120161124.pdf#####TEATCUP LINER SERIES WITH VARYING MOUTHPIECE FLEXIBILITY ABSTRACT OF THE DISCLOSURE A teatcup liner comprises an upper mouthpiece, an intermediate barrel and a lower connecting tube. The upper mouthpiece further comprises a mouthpiece transition, a mouthpiece lip, and a groove on an outer surface of the upper mouthpiece 5 to provide flexibility in the upper mouthpiece. The intermediate barrel extends along an axial direction for receiving a teat inserted axially thereinto through said mouthpiece.