This is a "sprinkler" designed for the cutoff edge of a 2-Liter pop bottle (110mm wide at cutoff). The 3DPonics sprinkler may cause water shed if the plan grows between the sprinkler and the edge of the container. The 3DPonics root sprinkler may require some extra work to separate it from the roots depending on how the plant grows. With the sprinkler being built onto the edge of the bottle it allows for the plant to not rest against a sharp edge of the plastic. The water is delivered below where the edge of the bottle, so the runoff would stay inside the container.