Made of quality clay with porous structure, which can automatically absorb water or nutrient solution into the soil to moisturize plant roots. It is recommended to refill every 4-7 days according to actual needs. Automatic slow drip function prevents plants from drying out when you are on vacation or forget to water, allowing you to travel with peace of mind without worrying about finding someone to water your plants. Easy to set up: simply fill water through the hole, insert the waterer into the soil, and it will start working. The upward opening design facilitates easy water filling (better visibility under light). Cute frog styling with upright design for larger water capacity, upward-facing beak design for easy water addition, serving as a pretty decoration that kids will love. Perfect gift for gardening lovers, family and friends, ideal for first-time gardeners and potted plant owners, making gardening easier and plants healthier. Specification: Material: Clay; Capacity: 140ml, 180ml; Color: as shown in the picture. Package Included: 4 x Self Watering Spike