While looking for good stuff to bring you i found this at the mac osx hints blog …
Tether plastic caps to Apple’s laptop plugs
I like that Apple provides little caps for the various laptop cables, but I am always afraid of losing the caps. This is especially important for my Powerbook’s power supply cable. Since I throw the power supply in my bag, I was concerned that the prong (tip of the connector) would get damaged, so I use the plastic cap for protection.
My little solution for tethering the caps is pretty simple. All you need are the supplied cap, some dental floss, and a safety pin. Here are the steps:
- Using the safety pin, make a small hole in the top of the cap.
- Thread the dental floss into the hole made with the safety pin. You can use the safety pin to help push the floss through the hole.
- Once the floss is through, make enough knots to prevent the floss from sliding out the hole. Trim any excess floss for neatness.
- Tie the other end of the floss to the cable.
When done, it should look something like this:

Now the cap is tethered to your cable and available to protect your connector whenever you need it. I don’t have a MacBook Pro, but I understand that those caps are similar to the iPod connectors, which can also be tethered without any problems.