About Local soda or cordial from Hong Kong

This is exactly the sort of thing I like bringing back from Hong Kong: small enough to fit in a bag, but specific enough to remind you where you bought it. For drinks, I would bring a can or bottle for curiosity rather than fill a suitcase with it. It is also the kind of thing you can talk about when someone asks what you brought back, because there is usually a little story attached to where you found it.