On Amazon.com where you can now get this
Amazon Basics Retractable Comfort Grip Ballpoint Pens 12 Pack for just $2.30 shipped .

Featuring ultra-smooth ink, these pens are fabulous for jotting down notes at the office or in school. At such a low price consider stocking up before the school year begins!
这是一款高品质、经济实惠的圆珠笔。这款圆珠笔设计简洁,适合日常写作、绘图和标记等各种用途。该圆珠笔采用舒适的握持设计,配备了柔软的握持区,使您在使用时感到舒适并减少手部疲劳。这款笔的笔身由耐用的塑料制成,轻巧且易于握持,适合长时间写作。