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Adjustable glass heat insulation sleeve length, it can make adjustment according to different size of the cup. Any of the diameter of the glass can be used. Strong practicability.Two kinds of materials to ensure that heat insulation effect.There are many colors can be chosen. Put the inner rubber bladder into the outer woven jacket.The outer woven jacket have the thread gluing that can cooperate with any of the diameter.And it can stick on the canvas of different design in outer jacket according to individual interest.
North China University of Technology
Beijing, China
Liang Xu,
North China University of Technology