Plant Self Watering Spikes Devices with Adjustable Release Control Valve for Home and Vacation Plant WateringA simple way to keep your plants from dying when traveling. Easy to use, fill a standard soda bottle with water thread the water spike on, and insert it in a flower pot. You may need to experiment with hole size to get the best results, All plants need different moisture and water will be absorbed differently depending on the soil type used.

it is ideally on a standard PCO1810 (also PCO28) PET bottle, which is one of the standards (in Europe).

The threadThe outside diameter is 27.43mm and the pitch is 3.18mm.

The item was printed using normal cheap PLA. Printed with 100% infill and no supports