In the US, I remember when the "wide-mouth can" gimmick became popular; nearly all the soda and beer brands adopted it at exactly the same time, because there's

In the US, I remember when the "wide-mouth can" gimmick became popular; nearly all the soda and beer brands adopted it at exactly the same time, because there's really only one supplier of aluminum-can-tops. I would expect that's true about the braille thing in Japan too.