12pcs/Lot Automatic Watering Irrigation Spikes Garden Plant Flower Drip Sprinkler Water Watering Kits

These have worked out pretty well. Push pins are included in the package so you can punch your own holes. Instructions are included. Otherwise, they fit most bottles as opposed to other irrigation spikes I have ordered. All in all, they do what I bought them for.

These do not fit standard 500ml water bottles

Great concept. Too bad these did not work!!

Does NOT fit an average water bottle. Does NOT appear to appropriately 'drip', if at all. The directions, label, etc. are all in JAPANESE so, unless you read Japanese, you won't have a clue as to any 'tricks' to making these work!!! I've purchased other watering spikes and they all easily fit on most ANY water bottle and the dripping that allowed for the irrigation worked easily and noticeably. I do NOT recommend purchasing these....not at all!!!!!!!!