Recreated and enhanced from
https://www.thingiverse.com/thing:1731973
by chuckv3

Added the snake to the 'thing' obtained from:
https://www.thingiverse.com/thing:993927
by SOELexicon

Design some pens to fit inside a standard 10x10mm aluminium square tube but these broke of immediatly when trying to mount the tube.
I've added a little rim for estatic purpose but this holds the tube firmly by itself.

Long print, took me two times 6 hours +.

Update 2 jan 2018: Added bottom lay-in to prevent bottles falling through the gaps between the 2 lower tubes. Printed in 2 halves because of dimensions. Matches exactly my shelf width. Measure and adjust before printing to match yours.