Container for liquid or paste - is of rubber or similar material with wall of neck formed of hard elastic material

摘要

The vessel accommodates liquid or paste, having a round rectangular main portion and a neck which can be sealed off. It is of rubber or similar elastic material. The wall of the neck can be of hard elastic material, with two tongues inside on opposite walls. These bear against each other in the absence of external pressure on the neck, and are moved apart by pressure on the neck at right angles to the direction in which they extend. ADVANTAGE - Easily emptied and less environmental pollution.