This is expected and nothing really out of the ordinary: the Olympic torch relay in Hong Kong was heavily sponsored. Samsung flags and thundersticks (with Beijing logos too) were handed out to the people lining the streets.
Here was a whole delegation wearing these green or red t-shirts and red caps with Coca-Cola’s signature. The torch group was preceded by a Coca-Cola truck (along with an official car, if I remember correctly), that hinted to the crowd that what they came to see was approaching.