A liquid lens includes a sealed shell, a gaseous material, a transparent carbon nanotube structure within the gaseous material, a liquid material, and a first electrode and a second electrode, a voltage being applied to the carbon nanotube structure causes rapid heating, which is transferred to the gaseous material to change the pressure thereof. The method includes flowing a multiphase fluid into a circular distribution header of a multiphase separation system and separating the multiphase fluid into gases and liquids within the circular distribution header. Further, the disposable insert can be made of a biodegradable material, recycled plastic, or non-recycled plastic. The single-pass may be a continuous process or a periodic process. The particles are expanded with an expansion fluid to form an in-situ foam core and to thermally bond the in-situ foam core to the first and second layers. The system may include sensors and monitors such as: IP-camera, illumination sensors and entry detectors.