Eight is a screw-on plastic connector containing a mini hydroelectric plant, which turns a pair of used PET bottles into a luminous hourglass.

Eight is a mini hydroelectric plant containing a hydro turbine and generator. It produces electrical energy via the movement of the turbine, and lights up a set of LEDs. Encased in a double-ended screw cap, it functions when attached to the mouths of two recycled PET bottles. The assembled unit act as an hourglass; gravity acts on the water to drain it from the top bottle and filter into the lower bottle, activating the turbine on the way.

Eight converts the energy into light for a certain amount of time (which is governed by the size of the bottles and the amount of water they can hold). Eight grants the user light as well as a sense of time. As the water completes its movement, the LEDs (which face up and down) gradually dim down. Simply rotating the bottle will allow the user to continue the generation of light.

The light is distributed onto direct and indirect surfaces. Refraction through the water and plastic, as well as the form of the bottles themselves, enhance the distribution of the light. The waterproof LEDs are hidden within the cap element, which limits glare. As long as identical bottles are used on each side of the cap, Eight will achieve stability and stand without support.

Various LED colours to allow the user to customise their lamp. The dimensions of the cap element (when unassembled) are 65mm x 35mm. The universal-size cap detail is compatible with different PET bottle sizes (from 0.5L to 2.5L), which grants users the flexibility to express their own style. Eight influences our recycling habits in a positive way.