When it comes to knives, you can do a lot better than whatever you relied on in your younger days. Yes, it's full of memories, but it's more useful as a paperweight than a knife. For a time-tested blade with serious details, check out the Key Knife from the makers at SOG.
It's a subtle lockback pen knife with a handle that mimics the size and shape of a standard house key, letting it blend in with the rest of your key ring. At just over two inches long when closed, you'll only notice this knife when it comes in handy, and thanks to its extra-strong durability, it'll last you for years to come.