brake bleeder that you can fit on a normal pet-bottle
blowing compressed air through the big hole creates a venturi effect that creates vacuum in the bottle.
attach bleeder hose to the smaller fitting.

Air inlet is 6mm ID, 10mm OD
bleed hose 4mm ID, 6mm OD

prints best with 0.1 mm layer height.
Sldprt file included for easy editing.