Ikea sells a cabinet with only 20cm in width. It's great for oil and spices, but the bottles are quite unstable when the drawer is pulled out quickly. This separator can be clipped on the horizontal beams.

Uses this library for round edges:
https://www.thingiverse.com/thing:3313291

Printing hints

I used SEPARATOR_HEIGHT = 61mm because because this is the maximum size the Kossel mini can print (~ 20cm diameter). It also happens to fit well for the upper part of the drawer. You might want to increase size for the lower drawer if you have a larger printer. A smaller one (less material, faster printing) is fine too.

Information about the piece of furniture

METOD Base cabinet/pull-out int fittings 20 x 60 cm
292.160.85 892.117.92

Width: 20.0 cm
Depth: 61.6 cm
Height: 88.0 cm
Frame, depth: 60.0 cm
Frame, height: 80.0 cm

Picture of cabinet on Ikea web page
Link to Ikea UK

No

0.2mm

20% but everything should be fine

using >3mm brim is highly recommended