Raised Bed Watering System \"Hydro Cup\" - Now in a practical set of 5 Our \"Hydro Cups\" effectively assist you in irrigating your raised bed by releasing water under the surface of the soil directly at the plant roots, replacing your otherwise regular watering habits. This raised bed watering system has been specially designed to deliver the right amount of water to the plant roots in a dosed and targeted manner. A robust root system ensures healthy plants and greater yield. All you need is empty plastic bottles. These can simply be cut open and attached to the clay cones. Everything else takes care of itself. Recycle your plastic bottles and help your raised bed to thrive day after day! PET bottles or cups are not included.