Flexi-ref  

The sun reflector Flexi-ref reflects sun rays to or away from plants. In case a plant needs more sunlight in a shaded area, the reflector is placed behind the plant, however, if it needs less sunlight in a sunny area, it is placed in front of it. 

It is made from coke aluminum cans, an umbrella skeleton, and re-used plastic straws and wires. Because of the flexibility of the umbrella skeleton, its size is easily adjustable just by folding it down.