Since you mentioned Cold Steel, I have one of these:
Aluminum Head City Stick - Cold Steel Knives
It is right at home at a concert, a fancy dinner, or just walking down the street. I also have a very simple inexpensive rattan cane that I really like. The City Stick has a little more mass, but is still light enough to respond with speed. The rattan cane is a little lighter and has a crook. Both have their good points. Michael Janich's Martial Cane Concepts that I mentioned earlier does not use the crook, so both are great for defense using his system. The crook is handy for hanging the cane on your arm when you need to use both hands. The City Stick can strike with a little more force.
Be careful - they also make a City Stick that contains a sword. Cold Steel's catalog didn't mention the sword and the retailer where I purchased it did not know that it had a sword. I discovered the sword as I was examining it. That would not be a good thing to run through airport security. I had them order one for me without the sword.