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In ordinary containers when the liquid (e.g. hand-washing liquid) is about to finish, its last drops stick to the walls of container, making it hard to pour out so that the user usually doesn't bother himself to extract it out.
This new container has a flat surface in its lower corner, making it possible to stand awry, gathering the remaining liquid in a place. These last drops then could easily flow out via the narrow groove on the side of the container.
This product enables user to consume what he has paid for until the last drop, sustainably and green!
University of Tehran