Earlier I walked past the Wan Chai branch and they were giving out free herbal teas to prevent colds and flus.
(picture shows Wan Chai branch with herbal teas ready for people to take).
Anyway, I took one and drank it as a normal drink, it was pleasant with a slight bitterness.
Later I was in different area so I went to the nearest branch to see if they were doing it too and they were.
However this branch was not promoting it and you had to ask to get it.
As for the taste, the drink at this branch was not as strong as the Wan Chai branch.
But anyway, Thanks to the generosity of Kung Wo Tong for giving people free herbal teas.
You can get yours at any branch from 1-2pm and 7-8pm.