The Water Cube, also known as the Beijing National Aquatics Center, is a famous sports stadium in Beijing, China, with a distinctive tensioned membrane structure. The tensioned membrane, often referred to as ETFE (Ethylene Tetrafluoroethylene) skin, provides a unique architectural feature that is both visually striking and functional. The membrane is designed to be lightweight, durable, and energy-efficient. Pictures of the Water Cube with its tensioned membrane can be found in various online platforms, architecture books, and travel guides.