This 'Solid Titanium' Pen & Stylus by Chadwick Parker and Joe Huang allows for interchangeable ballpoint tips without having to continuously buy new pens. This compact and sleekly designed pen is compatible with several refills including the Uni-Ball, Mont Blanc and Bic.
The product is designed so that the cap and body of the pen are interchangeable, so if you want to mix and match the silver or black casing, it can be done. It only costs $65 dollars to own one of these, but that is a small price to pay considering that all you would have to purchase going forward are the refills.
The Solid Titanium would be cost effective for businesses, and would also make for a great gift idea.