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The bottle hanger is a handy product made up of two lightweight plastic rings: one that fits around the neck of a drinking bottle and the other that can be hooked onto a backpack, handbag or belt. This means that you can keep your hands free for carrying or doing other things and don’t have to throw the bottle away for the sake of convenience before it’s empty.
Islamic Azad University
Souroush Vahidian Kamyar, Negar Vahidian Kamyar