Watering spout for 2 liter bottle

by edmo, published

Watering spout for 2 liter bottle by edmo Jun 22, 2011

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Featured in Make Magazine's Winter 2013 Ultimate Guide to 3D printing!

This is a watering spout for a 2L bottle or anything that can screw on to soda bottle threads. There is also a Autodesk Inventor file attached that has no threads, so you can adjust as you see fit.
The point here is that, thanks to the wonders of 3D printing, you can repurpose what would be a piece of trash into something useful. This spout would be useful for seedlings or other small plants that require measured amounts of water. Also, this watering spout has 1/8" thick walls. You can't buy something this durable at the store!
I've recently (May 2013) uploaded a modified design file that takes care of some sealing issues and adds threads to the bottle. I added the threads in with an assembly, so the STL file got a lot bigger in the process. It prints great, though. If it still leaks, try taking the rubber gasket out of the 2 L cap, drilling it out and using it as a washer.

ljudmila changed up the threads:

Chickan put this on a watering hose:

chickan also made one with different threads:

uumeran adapted it to a milk jug:

CaptKirk made it smaller and more efficient:

steveweber314 turned it into a low-pressure garden hose nozzle:

Sylvain3D added a handle and made a few modifications to the nozzle:

mraiser put it on a kitty litter jug:

zhinker put it on a US milk jug:

Don't have a 3D printer but want one? Message me and we can work something out. :)


I'd recommend running this through the dishwasher before you water your plants with it.

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Okay so how did you get the design for the threads? Thanks, and great work!

Just printed this and it fits well. I'm curious how you solved the issue of the vaccuum/bottle neck. Did you place a hole somewhere in the bottle to prevent this?

Yeah. A hole in the bottle with a check valve works great. Here's a youtube video on how to make a cheap one. You can scale it down to fit your bottle. Thanks for printing it!


FYI: I think this model needs to be scaled up 25.4x for inch
gt; mm conversion.

Probably. I can't help it. I was raised this way.

This looks really handy indeed - I've found my little spray bottle cannot keep up with the growth of my tomato plants, so I've just been pouring water straight onto them - not ideal, and erodes the dirt at the roots.

This, looks like an ideal solution :D

Does it perhaps shrink while cooling? And if so - if you pry it off the bed before the normal time, do you think it would 'shrink to fit' on the top of the bottle? I've had that work on my LED diffuser.

Thanks! I think your idea of allowing it to shrink onto the bottle would work. However, I think I just didn't compensate for the width of the extrusion. At any rate, it does screw onto the bottle, even without the threads. It will probably strip out eventually, though. If you wanted to try the shrink fit option, I would print it at about 99.5%, then soak the top of the spout in boiling water to soften it up. Alternately, I may add ribs to the inside of the spout so the threads will have more to stick to, and we can get rid of the press-fit cap idea.

Thanks! That was really nice of you.