OLED Roll Phone

Designer Tao Ma has created the world’s shortest roll-up phone. The display screen rolls up so the entire phone is about the size of film canister. The tiny keypad roll might prove challenging to keep from making fat finger typos. It does run on batteries but the OLED screen makes it eco-friendly.

Coke Powered Phone

Daizi Zheng designed a cell phone to run on Coke. Her design has the potential to operate three to four times longer on a single charge than conventional lithium batteries. She wrote, “The concept is using bio battery to replace the traditional battery to create a pollution free environment. Bio battery is an ecologically friendly energy generates electricity from carbohydrates (currently sugar) and utilizes enzymes as the catalyst. By using bio battery as the power source of the phone, it only needs a pack of sugary drink and it generates water and oxygen while the battery dies out.”