# Designing a refill system

A reference shortlist for the interface, replenishment loop and responsibilities of the user.

## What should a product designer study before designing a refill?
Use these examples to compare a case-and-cartridge system, a compact, a tablet-and-bottle routine, a carton refill and modular palettes. The design question is how the repeat purchase connects to the permanent object.

## Before you choose
- Sketch the container-to-refill interface and what prevents an incorrect fit.
- Map opening, emptying, cleaning, refilling and disposal as separate steps.
- Record which claims need supplier evidence, testing or lifecycle analysis.

## Tradeoff
An elegant starter kit is only one moment. The refill package, instructions, regional supply and end-of-life route belong in the same design brief.

## Examples and sources
- Fussy: Fussy Deodorant — Refillable pebble deodorant. [Brand source](https://www.getfussy.com/); [Catalog](/api/products/fussy.json)
- Kjaer Weis: Refillable Makeup — Heirloom metal compact. [Brand source](https://kjaerweis.com/); [Catalog](/api/products/kjaerweis.json)
- Blueland: Clean Essentials Kit — Dry tablet + forever bottle. [Brand source](https://www.blueland.com); [Catalog](/api/products/blueland.json)
- Cleancult: Milk-Carton Cleaning Refills — Carton refill + permanent bottle. [Brand source](https://www.cleancult.com); [Catalog](/api/products/cleancult.json)
- MOB Beauty: Refillable Makeup System — Modular refill palettes. [Brand source](https://mobbeauty.com/); [Catalog](/api/products/mobbeauty.json)

Based on the dated catalog, not hands-on testing. Current price, stock, specifications and performance are not verified. Check the linked brand source before buying. Creative DTC is an editorial directory, not a seller.
Catalog snapshot: 2026-10-13