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In general, Base Tetra Pak of straw is bent to make the straw suitable for the package, and the bending deformation is very difficult to change. When using the straw, sometimes the fluids are more likely to be out because of the barometric pressure and extrusion force that smears the clothes, hands and the table.
The new straw is designed two bends that could be adjusted the angle accounding to the demond,which is convenient and clean.
Shanghai Second Polytechnic University