1.   Once the mercury has escaped, the battery cuts off because the conductive material is gone.

2.   The colored pixels are separated by a thin, transparent layer of conductive material, so that light can pass through the stack.

3.   The plastic sheets are coated with a transparent conductive material, and the emulsion is made up of microscopic polyiodide crystals, which absorb light strongly.

4.   The smart glasses are wrapped in a dishwasher-safe conductive material similar to the tagging technology used to protect retailers against shoplifters.

5.   Two sheets of conductive material, such as metalized plastic, sandwich a non-conductive material like foam rubber.