Water-based permanent markers feature a unique, patented “Thumb Button Cap” for one-handed cap release, chisel point for thick marks, & Microban antimicrobial protection that lasts the lifetime of the product. Built-in antimicrobial protection continuously fights the growth of microbes, such as stain-causing, odor-causing bacteria. Nontoxic, low-odor ink is smooth flowing & will not harm data on CDs & DVDs. Permanent markers deliver bright, permanent colors.