Watering Control: Self watering spikes with control valve switch, can effectively control the flow rate of water, the drip speed is controllable from 0s/1 drip to 90s/1 drip, and slow release drips can last 1-15 days. Bracket Design: The newest self watering spikes adds an anti-tilt design, which is windproof, rainproof and anti-falling and allows you to increase the water bottles capacity without worrying that the water spike will fall over, ensuring greater stability. Easy to Use: No tools are required for installation, just drill some holes in the bottom of the bottle or cut the tail of the bottle to keep the air flowing. Suitable for 99% of the beverage bottles on the market - Dr. Pepper bottle, Pepsi bottle, Coca-Cola bottle, Lipton bottle, Diet Coke bottle, or other 1. 1-inch inner diameter bottles. Widely Compatible: Whether indoor/outdoor plants or garden, home or office, this self watering spikes system fit potted plants, houseplants, patio plants, hanging baskets, desk pots, hanging plants and etc. Quick customer service, answer and solve all your concerns about the product within 24 hours.