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Save resources is a kind of consciousness.When we 're running out of the toothpaste,there will be still some toothpaste left in the bottom of tube.I made a design that the bottom of the tube is sealed by concave-convex structure.On the one hand,it is convenient for us to use the rest of toothpaste directly by openning the tube from the bottom.On the other hand,we can seal the tube again at any time if there are still some toothpaste left,which avoids bacterial contamination.Thus we can really make it happen that the toothpaste is none left.It makes a mickle if everyone saves a little.
Dalian Minzu University