BIC Prevaguard Round Stic ballpoint pen contains an agent incorporated into the plastic that protects the pen itself by suppressing the growth of bacteria, algae, fungus, and mildew. These products protect the pens themselves and do not protect users or others from disease-causing bacteria, viruses, or germs. The agent should last the lifetime of the pen's plastic unless the plastic is destroyed.   Along with the agent on the pen, the Round Stic pen is the BIC product you know and love. The BIC Round Stic pen writes 90% longer than Papermate InkJoy ST100, giving you great value for your money. This pen also features a medium 1.0 mm ballpoint that delivers smooth writing to create vivid, highly visible lines ideal for note-taking, drafting, doodling, and other writing activities.