Bottle Watering Spike — 2×2, 0.75 mm

A bottle-fed watering spike for experimenting with slow drainage into a plant pot. The source identifies the 2×2 version as a slower-draining option and specifies a 28PCO1881 bottle thread. Check the connection with your actual bottle and observe the drainage in your soil before leaving a plant unattended: the design has no verified universal watering rate. The author’s print notes recommend PETG at 0.20 mm layers without supports.