Foldable wallet pen
I carry a pen that I wish was more readily available. It’s a plastic pen shaped like an airplane that folds flat and sort of clips together to make a sturdy shape. It folds once lengthwise to fit in your wallet. Then, to write with it, you snap little plastic notches together inside so that you have three reinforced surfaces. Now I never need to borrow someone’s pen. They’re pretty cool. I even bought 48 of them figuring the company would go out of business at some point.
My only problem with the FoldzFlat Pen is that they’re totally ugly, produced mainly for little kids. I’m hoping that with the right publicity they will start marketing to the nerd elite.