Support-Free Honeycomb Interlocking Water Bottle Rack

This stackable and interlocking bottle rack is perfect for reusable water bottles, wine bottles, travel mugs, and any other circular object with comparable diameter. The cell has a little more internal space than similar storage systems, and I found this works best for the majority of bottles with 50-100mm diameters. The other modular systems I tried from Printables seemed a bit flimsy, so this interlocking rack is overengineered with a focus on creating a rigid and stable structure.

The cell's internal diameter is 103.5mm, and each cell is 180mm long. The cell is designed to be extremely forgiving to print, with all overhangs at 45° or less, and all bridges shorter than 11mm. This design does not require supports. 

All dovetails in the design have a 0.2mm tolerance.* If you're not sure about the accuracy of your printer, try printing test parts “A” and “B” in the “Tolerance Test Pieces” model folder. I recommend printing both test parts at the same time to check the printer's accuracy in both X and Y dimensions.

Features

• Cell interior diameter is 103.5mm.
• Multiple cells interlock into a customizable honeycomb pattern.
• Three dovetails on each side ensure a strong and stable fit.
• The cell back has a lip to keep items from slipping through. 
• Each cell connects to any other cell.
• Prints in ~6 hours (dependent on printer and settings).
• Uses ~127g filament.

Recommended Settings

• Walls: 3
• Infill: 15%+ using a high-strength pattern like gyroid or cubic
• Layer Height: 0.28mm height
• Material: PLA+, PETG, ABS
• Supports: No
• Change Orientation: No

* I found 0.2mm ideal for creating a tight connection that can still be separated if needed. Please message me if you need a different part tolerance design.

Need a smaller version? Try the 18oz design!