Yes, our planter box factory does offer self-watering liners, both as standard options and as fully customized components. Each liner can include a hidden water reservoir, a capillary wick or moisture-transfer fabric, a raised soil platform, an overflow outlet, and a fill tube, so plants receive steady moisture without sitting in stagnant water. We make liners for rectangular, square, round, modular, balcony, patio, raised-bed, and indoor planter boxes, using PP, ABS, HDPE, or recycled plastic blends with UV stabilization when needed. For OEM/ODM programs, we support size matching, reservoir depth adjustment, drainage slot layout, color selection, 3D drawing review, rapid prototyping, sample testing, mold development, private-label packaging, and bulk production. If you already have a planter box, we can design a matching self-watering liner around its internal dimensions; if you are launching a new planter line, we can integrate the liner from the start. Send your target size, material preference, quantity, and market use, and our team will recommend a practical self-watering liner solution for your project.