Plant Watering Bulbs: These watering bulbs are made of durable, flexible plastic material and hold 80 ml of water. They are resistant to breakage and feature high transparency, allowing you to easily monitor the remaining water level. Refill every 4 to 5 days as needed. Constant Water Source for Plants: The plant watering bulbs provide automatic irrigation. Simply fill the bulb with water and insert it into the soil; water will be released gradually to keep your plants hydrated without the need for manual watering. Simple and Effective Use: The bulb has a 0.39-inch (1 cm) opening. To use, press the opening with your thumb, insert the bulb into the soil until it reaches the base, then release to allow water flow. Package Content: Includes 12 transparent automatic watering bulbs, each measuring approximately 1.96 x 5.12 inches (5 x 13 cm), with a 80 ml capacity. The clear design blends naturally with plant pots. Suitable for use with multiple plants at once, offering convenience and reliable performance. Wide Application: Compact and space-saving, these watering bulbs are suitable for houseplants, hanging plants, potted plants, patio plants, and outdoor plants. Adjust the insertion angle to regulate water release based on individual plant needs.