This is a remix from

Dual spool holder Ender 3/Pro/Cr10/Mini/S/S Pro by Deian.
and
Filler - The Customizable Filament Holder that fills your printer! by HugoHuge.

Redesign the middle part for easy print and no support nedeed.

Printed on a mod Ender 4 with direct extrusion.
PETG
MK8 0.4mm Nozzle
0.2mm Layer Height
40% infill
5 shell lines
No supports