This is a replacement cap I made for the 7.6L and 11.3L watering cans from DCN Plastic (http://www.dcnplastic.com). In their catalog, the watering cans are the 7400 and 7500 models respectively. They are sold at Home Hardware in Canada and have a tendency to crack after a while.

The holes may be a little smaller than the original spout depending on how your first layer prints. I've included the FreeCAD file in case you want to open them up.

I'm not sure if there's a bug in freecad but for some weird reason you can't fuse the thread and the cap together to create a single part. In order to create the STL file, I had to select both the spiral and the cap, then export the model.