A designe expressing the colors of the pen in shape. We regard the color as a physical phenomenon coming from the difference in wavelength of light and represent it as a pattern on the pen body. In other words, the red having a long wavelength of light is represented by a pattern of long waves, and the blue having short wavelength of light is represented by a pattern of short wave. The two different patterns are applied to each pen body. This patterns help you to distinguish a color with touch of your hand if the pens are in a bag or pencil case where you cannot look at.
In Korea, they often use "yolk" as a meaning to express the important things and places. I studied how to wrap SSD safely like an egg which covers up its yolk safely. An air bag cushion is very convenient; it is light, and easy to put the air into the cushion when it is needed. Moreover, SSD with an air bag is a safe even if it falls from a high place, and into the sea. It is named "yolk in the cloud" because the yolk wrapped by air cushion looks like floating on the clouds.
This vase looks as if a bowling pin is falling. In spite of the fact that the vase isn't designed to fall over, paradoxically it shows a reversal in the appearance of a bowling pin that it exists to be fallen onto the floor. The shadow-shaped bases stably supporting the vase is made of marble.