Designer Releases Open-Face 3D Bath Bomb Mold STL for Hobbyists

A new printable bath-bomb mold designed for hobbyists and small-batch makers landed on January 20, 2026, offering a low-cost alternative to metal or vacuum-formed tooling. The mold, credited to the maker account mold2molds, is an open-face, single-piece 3D model sized X106 × Y30 × Z95.8 mm and intended for direct packing of the bath-bomb fizzy mix and straightforward release once the bomb sets.

The listing provides practical 3D-printing guidance alongside technical specs. The author includes recommended print settings and notes on orientation and post-processing that aim to help makers get a clean surface and reliable demolding without complex assembly or multiple parts. Because the file is a single-piece STL, printers that prefer no-support workflows or minimal supports will find the design approachable for a range of desktop FDM and resin setups.

Licensing and reuse rules are front and center on the page. The mold is offered under the CULTS PU license with specific sharing restrictions; the designer calls out limits on redistribution and on reuse/resale of printed molds. That means you can print for personal projects and small batches, but commercial resale of the STL or of printed molds may be restricted. Read the license terms before printing for any customer orders or shop inventory.

The format and intent make this useful for bakers of bath bombs who favor customizable runs and rapid prototyping. Open-face molds change how you pack the mix - you can press the fizzy blend directly into the cavity instead of filling a two-part sphere - and they cut down on cleanup and part alignment. For makers experimenting with layered colors, embeds, or tea-themed additives, the single-piece design speeds iteration and lowers material waste compared with casting metal or buying vacuum-formed tooling.

Practical considerations for the community include choosing filament or resin compatible with bath products and avoiding brittle prints that could shatter during demolding. The designer’s printing notes and recommended settings provide a starting point, but do test prints to dial in adhesion and surface finish. License reminders on the listing also mean shops planning to produce molds for sale should secure appropriate permissions before offering printed molds to customers.

This release reflects an ongoing shift toward on-demand tooling for small makers - accessible design files that let you prototype flavors, fizz patterns, and novelty shapes without large up-front costs. Expect more designers to offer open-face and single-piece STLs as the community adapts these files into seasonal runs, market stalls, and online storefronts while watching license terms closely.