NEWLY UPGRADED ONE-PIECE SELF WATERING SPIKES: This upgraded self-watering spike features a bevelled dual-runner spout with a control valve to adjust the drip speed at 40-60 seconds per drop. The sustained release provides water for 3-20 days, offering reliable hydration for plants during travel, vacations, or busy schedules. ENERGIZE YOUR PLANTS: These watering spikes help maintain healthy plants by delivering a consistent and measured amount of water, reducing the risks of overwatering or underwatering. Plants receive the right moisture level automatically, supporting stronger growth and vitality. HIGH COMPATIBILITY: Designed to fit most standard plastic bottles with a 28-30 mm (1.1 inch) inner diameter at the bottle neck. Compatible with common beverage bottles such as those from Coca-Cola, Pepsi, and other soda brands. Please measure the bottle opening before use. REDUCE YOUR GARDENING WORK: This self-watering system allows plants to draw water as needed, minimizing the need for daily watering. Ideal for use with vegetables, potted plants, houseplants, patio plants, flowers, herbs, hanging baskets, desk plants, outdoor gardens, and shrubs. EASY TO USE AND STORE: Made from durable materials with high strength and resistance to heat and cold, these watering spikes are reusable and built to last. Simple to install and store, they offer a practical solution for consistent plant care.