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EZ-TUBE is made of PC Plastic so it can easily stay in shape.The one-way valve is made of PC Plastic and Rubber。When people squeeze out toothpaste and release their hands,Barometric pressure will push Rubber to deform it then air can enter to balance Barometric pressure.One advantage of EZ-TUBE is that it can run out of toothpaste easily.And another advantage is that EZ-TUBE can be recycled because of the rugged shell.Workers only need to clean the shell and put in toothpaste once again Then it can be sold again.
Zheng Weite Wu Dongguang Zhao Yanqing LI Delin