# Modular Beauty Pens Karen Betts' KB Pen Swaps Between Eyes Lips and Brows By Amy Duong | Written with AI assistance | Published 2026-10-05 | Fashion Source: Trend Hunter, https://www.trendhunter.com/trends/refillable-beauty-pens References: [retailtimes](https://retailtimes.co.uk/kb-pen-launches-the-worlds-first-luxury-customisable-beauty-tool)  Karen Betts has introduced The KB Pen, a refillable beauty tool that lets users move between [eye, lip, and brow looks](https://www.trendhunter.com/trends/artist-color-crayon) without changing the whole case. Built from precision stainless steel and finished with PVD, a hardwearing coating used on luxury hardware, it brings a polished, jewelry-like feel to everyday makeup. The pen uses [interchangeable cartridges](https://www.trendhunter.com/trends/refillable-packaging-innovation), so the same body can keep working while shades change. The launch range includes 19 cartridges and three PVD finishes, giving the tool both variety and a more lasting build. That combination makes the product feel closer to a keepsake than a disposable pencil. This offers a cosmetic tool that is meant to stay in rotation instead of being tossed when one shade runs out. It also points to a quieter shift in premium beauty, where [refillability and customization](https://www.trendhunter.com/trends/pen-creator-studio) now sit beside finish and color as part of the appeal. Image Credit: Karen Betts ## Trend Insights (Trend Hunter) - Score: 7.8/10 - Popularity: 67% | Activity: 67% | Freshness: 100% - Audience gender: 10% men, 90% women - Primary generations: Gen Z, Millennial - Top markets: Europe ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Fashion](https://www.trendhunter.com/fashion) > [Cosmetics](https://www.trendhunter.com/cosmetics) ## Key Themes ### What's Driving This Trend - **Modular Beauty Tools:** Interchangeable cosmetic systems create room for premium products that blend personalization, durability, and reduced replacement waste. - **Refillable Luxury Formats:** Long-lasting cases paired with replaceable consumables signal a shift toward beauty packaging that feels collectible while supporting recurring cartridge sales. - **Jewelry-like Cosmetics:** Elevated finishes and durable materials are turning everyday makeup tools into prestige accessories with stronger emotional and aesthetic value. ### Who This Affects Most - **Cosmetics:** Multi-use refillable formats are reshaping color cosmetics by combining shade variety with more sustainable and premium product experiences. - **Beauty Packaging:** Durable housings and cartridge-based designs introduce new packaging models centered on longevity, customization, and reduced single-use components. - **Luxury Accessories:** Beauty products with hardware-inspired finishes blur category boundaries, creating opportunities for accessories that function as both tools and style objects. ## Related on Trend Hunter - [Refillable Foundation Systems](https://www.trendhunter.com/trends/puredose.md) - [Purse-Shaped Beauty Balms](https://www.trendhunter.com/trends/the-crme-shop-kiss-blush-lip-cheek-balm.md) - [Refillable Skincare Systems](https://www.trendhunter.com/trends/meld.md) - [Personalized Beauty-Tech Systems](https://www.trendhunter.com/trends/maxpace.md) - [Interchangeable Beauty-Tech Systems](https://www.trendhunter.com/trends/skintune.md) - [Modular Magnetic Pens](https://www.trendhunter.com/trends/spinnx.md) - [Customizable Nail Polish Kits](https://www.trendhunter.com/trends/buildabox-bundle.md) - [Refillable Skincare Lineups](https://www.trendhunter.com/trends/refillable-skincare1.md) - [Color-Matching Beauty Devices](https://www.trendhunter.com/trends/boldhue-starter-kit.md)