A Japanese company is selling these plastic bottles that hold 1.4 grams of green tea or other additives in the top. Twist the cap to release the tea into the water, creating an instant serving of cold-brewed tea. (The bottles in the picture are actually a kale-based health drink.)
I've no idea how much better the "instant" green tea might taste, but it's a clever, if still wasteful product. Wouldn't it be better just to sell the instant tea? I'm of slightly mixed emotion, though, since one of the things I love about Japan's ever-present vending machines are the cheap, unsweetened green tea always at ready. When I was a sweaty foreigner tromping through Tokyo, I guzzled more than my fair share.
(I had also packed a whole carton of American Spirit cigarettes, fearing I wouldn't be able to find any in Japan. Then I got there and realize that not only were American Spirits on sale in almost every cigarette vending machine, but they were actually cheaper than in New York.)
Bottle Innovations: Instant fresh tea [Trends in Japan]