It is installed in the head of the tube.It is uesd at the better fluidity cream and it can limit the volume of the cream that is squeezed out.At the same time,it can make the cap stay clean.

It is installed in the head of the tube.It is uesd at the more viscous creamand it can limit the volume of the cream that is squeezed out.At the same time,it can make the cap stay clean.