When it comes to the convenience of carrying a single pen rather then four pens, the solution is Initiative's four in one colour pen

• Each pen includes a retractable black, blue, red and green ink colour
• Ink pen is tamperproof, waterproof and fadeproof
• Regulated ink flow to avoid scratching and blobbing
• Ink Colours include black, blue, red and green all in one pen
• Made in China