The Opus 88 Demonstrator Mocha Mousse is a special interpretation of one of the Taiwanese brand's most recognisable fountain pens. With its perfectly cylindrical silhouette, flat ends and clean architectural lines, the Demonstrator combines a bold modern presence with the practical functionality for which Opus 88 is known.

This Special Edition draws its inspiration from the Pantone Color of the Year 2025, Mocha Mousse. The glossy brown resin body is complemented by deeper brown accents, creating a warm and sophisticated tonal palette. A transparent amber grip section introduces a subtle contrast while allowing a glimpse of the ink as it flows towards the nib.

The result is a refined contemporary interpretation of the classic demonstrator concept: understated, elegant and particularly suited to those who appreciate timeless design enriched by carefully considered colour.

The pen features Opus 88's characteristic Japanese-style eyedropper filling system, providing a generous ink capacity. Filling is simple: the nib section is unscrewed and the reservoir is filled using the included eyedropper before the pen is reassembled.

An integrated shut-off valve controls the flow of ink between the main reservoir and the nib. Opening the tail-end valve allows ink to flow during writing, while closing it isolates the reservoir and provides additional security during transport. This makes the Demonstrator particularly practical for everyday carrying and travel, including air travel.

The Opus 88 Demonstrator Mocha Mousse brings together the brand's distinctive high-capacity filling system and unmistakable demonstrator architecture with a warm, sophisticated colour scheme that gives this edition its own unique identity.

Note: If you prefer a different nib size from those currently available, please contact us and we will be happy to check availability in more detail.