​Project Overview

​This project provides a durable, custom-fit solution for replacing broken or degraded OEM cup holders in furniture. Designed as a functional repair for a reclining couch, these inserts prioritize a clean aesthetic and a secure friction-fit to ensure they stay in place during use.

​Design Features

​Precision Fit: The outer diameter is tailored to match standard furniture cutouts, providing a seamless transition between the upholstery and the insert.

​Ergonomic Lip: Features a low-profile, textured rim that covers any rough edges of the couch material while maintaining a comfortable, snag-free surface.

​Optimized Depth: The internal cavity is deep enough to stabilize tall tumblers and bottles without being difficult to clean.

​Technical Specifications

​This model was developed and tested on a Creality Hi printer to ensure dimensional accuracy and structural integrity.

​Material: PLA (shown) or PETG (recommended for heat resistance/longevity).

​Infill: 15–20% Gyroid (provides excellent omnidirectional support).

​Wall Count: 3–4 walls for maximum rigidity and to ensure the side walls don’t flex under the weight of a heavy drink.

​Layer Height: 0.2mm for a balance of print speed and surface finish.

​Supports: Used auto tree supports with z-offset of .21 and 3 top layers - for easy removal and clean finish

​Installation Instructions

​Remove the remnants of the original broken cup holder.

​Clear any debris from the mounting hole.

​Press the 3D-printed insert firmly into the opening. The tolerances are tight enough that adhesives are generally unnecessary, making them easy to remove for deep cleaning.

​Designer’s Note

​This was the first successful functional project on this specific hardware setup, proving the system's capability for producing high-quality, practical household components. It’s a perfect example of how 3D printing can extend the life of furniture with a customized, "better-than-original" part.