水さし
中空の球体を斜めにカットすると注ぎ口が現れます
そこに一回り小さな球体をいれると、栓の役目が生まれました
見る確度によって、栓の球体とベースの口部の重なりの見え方が変化します
Pitcher.
When a hollow sphere is cut diagonally, a spout appears.
When you put a small sphere there, the role of a stopper was born.
The appearance of the overlap between the stopper sphere and the spout changes depending on the angle of viewing.
