A few weeks ago when I went to China Town, I came across these drinks in New Loong Fung Supermarket 新龍鳳行 (san lung fung hong). They are soya bean drinks from Yeo's, which I have never tasted before... And by the way I spell soya with an "a", the word just doesn't look right without an "a"... ^_^
|Green bean and Black bean soy drinks|
I definitely recommend the black bean soya drink... I can't remember the cost. But give it a go!
Update 23/06/2012 - they cost 39p per carton! There's also a red bean one, but the supermarket ran out :(