An up-and-coming "green" trend in Japan is the movement away from disposable beverage bottles and toward a refillable, washable bottles instead.
In other words, rather than walking around with those ubiquitous plastic water bottles, more and more people can be seen carrying their own personal mini-thermos—insulated bottles are especially popular as they can hold hot beverages (such as tea) in the winter or ice-cold beverages (such as iced tea) in the summer.
The photo below shows a cutified "insulated aluminum water bottle" made by Sweden's Laken.
[Source: Yahoo Japan News]
Laken must have made this cute model especially for the Japanese market.