"ACQUA light" is an emergency key-ring which contains a high intensity LED, can be used when blackout occurs, in emergency situation, and there is no sort of light around… Produced in a plastic material, contains also a high intensity LED, three button-batteries and a switch. It has a double cap for two kinds of bottle necks.
In recent big earthquakes there were a lot of people confined in debris of collapsed buildings, asking for help in darkness. What did they need most? It must have been water and light.
One possibility to combine the two, it came to my mind, would be a lemonade bottle and its stopper ball. Push the ball into the water of the bottle and the former would emit the light -- is my idea.
The most difficult problem to solve is to decide the size of the ball. The cell and the ball should be smaller. In addition, how to make the ball float and make it emit light evenly are still to be solved. There is nothing noel in my design. I just want to produce what people in distress really need.