This is a simple self-watering seedling tray based on the inverted-liquid principle, ingeniously leveraging the communicating vessels principle to combine everyday waste materials with 3D printing technology, creating a low-cost, highly efficient indoor gardening tool.

It consists of a standard clear plastic bottle and a custom 3D-printed base. To use it, simply fill the eight independent compartments in the base with soil and sow your seeds, then invert the water-filled bottle and insert it into the central circular hole in the base. Thanks to the siphon effect, water is continuously drawn up into the dry soil, keeping it consistently moist—effectively eliminating the headaches of overwatering that leads to root rot or underwatering that causes plants to dry out.

The transparent bottle design allows you to visually monitor the remaining water level, enabling “visualized care,” which is especially ideal for busy professionals or frequent travelers.

Features:

• Smart, constant moisture—perfect for the lazy: The unique inverted hydroponic design ensures “one fill, long-lasting hydration,” as plants autonomously draw water according to their needs, greatly simplifying maintenance.
• Efficient multi-plant cultivation in one unit: The base is scientifically divided into eight independent compartments, saving space while allowing you to grow multiple different plants simultaneously, easily creating a miniature ecological terrarium.
• Waste utilization, eco-friendly: By cleverly repurposing discarded beverage bottles as water reservoirs, this design embodies the principles of environmental sustainability and low-carbon living, turning waste into treasure.
• Intuitive water-level monitoring: The transparent bottle lets you keep track of the water level at a glance, making it easy to know exactly when to refill and preventing water waste.