The stainless steel mini bottle has a cover of a switch and a lock built-in. It is designed with supposing of carrying in one’s business bags/ handbags or for carrying when a light exercise like a brisk walking. I designed it without the bulge, the bulge of a lock lever and the opening-shutting hinge that we’ve seen in a traditional model are all fit into the bottle diameter, and this made its skinny and straight shape possible. 55mm (a little less than 2 sun. sun is a unit of traditional Japanese length.) diameter of it is easy open out even in a smaller hand. And the grip part of the finger is narrow in the middle and is holdable. (the outer diameter 58mm)

Winning the good design prize 2016.