I wanted a simple bottle holder that won't use up too much filament, whilst still being able to see all bottles from different angles. I produced this simple design using Fusion 360.

Print in VASE MODE with raft (for base) and 0.8 wall line width recommended!

This design fits 2 100ml Seachem bottles and 6 118ml API bottles.

I have included the singular bottle holders for those who need something more custom.

Print settings:

Wall line width (outer and inner): 0.8mm

Layer height: 0.2

Infill: 0%

Top layers: 0

Bottom layers: 6

Speed: 30mm/s

Build plate adhesion: raft

Raft extra margin: 5mm

Raft middle layers: 3

Supports: no

Special mode: ticked spiralize outer contour and smooth spiralized contours (aka. vase mode)

Filament used: 48g

Time taken: 4.5H