The U-CAP / Plastic Bottle cap

The U-Cap has dramatically solved the difficulty of opening a plastic cap. By projecting the side of the U-CAP to a softly asymmetric curve, we intend that enough power shall be transferred to the cap at one moment when we open it, while power shall be delivered slowly when we close it.
Moreover,The U-Cap consists of 'bio-degradable' plastic, which is eco-friendly material as compared with others. 'Bio-degradable plastic' is composed of both polyolefins and starch(6~15%), which can be dissolved in the water and disassembled by many microorganisms. Therefore, it needs not go through recycling or just be dumped on the street.