This planter is designed to be used with trailing plants like ivy. The holes in the spool halves of the Prusament spools are perfect for the tiny roots of the plants to grab onto.
As a bonus, the pot can accommodate an empty pot of 500ml Alpro Yoghurt to be used as a drainage pot (add holes to its bottom).
The parts are designed to be printed and connected together with the connector piece. The Prusament spool half slots into the ring pretty snug, so it should stay in there without glue.
The author hasn't provided the model origin yet.