Tube

A tube is a hollow cylindrical object, usually made of metal, plastic, or other materials, designed to contain, transport, or protect substances like liquids, gases, or small items. Commonly, tubes are used in plumbing to carry water or waste, in medical contexts for catheters or syringes, and in manufacturing for creating and shaping materials. Their shape allows for efficient flow and containment, and they come in various sizes and designs to suit different purposes. Essentially, a tube serves as a conduit or protective cover that facilitates controlled movement or storage of various materials.