Watering Bulbs for Plants - 3 Pack - HAND-BLOWN GLASS | Blue | Decorative | Indoor Use | Outdoor Gardens (by Best Home Products) Self-watering system eliminates the need to worry about leaving your plants unattended. Each three pack contains one small (8" x 2.5") and two large (12" x 3") water bulbs. Beautiful, genuine hand-blown glass design. Watering lasts for two weeks, until refilled. New size for smaller plants. For use with potted plants, houseplants, patio plants, hanging plants and outdoor gardens. * EASY TO USE * Simply fill the globe and insert it into soil.