Promotional Pens, Ballpoint Light Up Cow Pen - Illuminated, Just imagine this little moo-er in the hands of all your customers Designed with a miniature, cow shaped topper, this light up cow pen is an excellent way to light up your marketing plan Customize each ballpoint with a logo, brand name, or marketing message Simply twist to turn on off This product is not intended for use by children or pets It may present a choking hazard to children under 3 years of age. ... #24586 $1.56/each.