Union printed, Highlighter Twist Pen, These custom imprinted highlighter pens have many features that make them an incredibly desirable promotional product. The most obvious feature is the highlighter fixed on the back of the pen that allows you to write and highlight on one convenient tool. The most obvious feature is the highlighter fixed on the back of the pen that allows you to write and highlight on one convenient tool. Other features include a strong clip that can be fixed on to pockets or notebooks allowing for easy and convenient access. Black Pen comes with yellow Highlighter, all others match cap. Decorated in our Union Shop – Union Bug Available at No Charge!