Philips Avent hourglass

You'll need:

• 2x Avent bottles (or compatibile); I have 2x 125ml but it works albo with bigger version.
• 2x Avent teats.

Of course - use used ones. It's rubbish anyway...

Print:

• 1x ring.stl
• 1x wall.stl
• 2x nozzle*.stl

I have projected nozzles with 1.5mm hole; this gives about 1 minute for ~100ml of water. If you have problems with that - nozzles are easy removable (thread) so you can print version without holes and make some by yourself (with drill or soldering iron).

Prepare: you have to trim teats as in the photos.

Assembly: look on photos. It's really easy.