I found that a few of the other designs were difficult to hold onto while wet, so adjusting if there was a spill became a pain.

I designed mine with some grip and a center funnel down to 15mm that doesn't require supports on a decently tuned printer.

The threads are solid but not perfect, nor is the seal against the funnel, but 2 wraps of teflon tape hasn't leaked in a week of daily use by my son.

I have also found that using a standard set of pliers on the extended setting to grab the neck of the bottle helped get a snug fit, but it's 3D printed, so just snug or you might crack it.

Print Settings

Printer Brand:

Creality

Printer:

CR10S PRO

Rafts:

No

Supports:

No

Resolution:

.2mm

Infill:

85%+

Filament:
Hatchbox ABS, but I don't think PLA or PETG would do bad Black

Notes:

I used adaptive layers in Cura and it worked great, but a .2 height worked as well.

Category: Learning