parametric bird feeder attachement for bottles
thingiverse
Parametric Bird Feeder bowl that attaches to plastic bottles. Set the parameters to match your bottle for the print (see customizer or openscad file) I would recommend bottles with a bigger neck opening ~30-40mm. The standard values are set for common german bottles with a ~40mm neck (I dont know about other countrys). If you want to print a bowl for the very common smaller bottle opening of many PET bottles you can use the Parameters: cr = 14 ir = 11 c = 1 s = 3 oa = 400 You can test your parameters by printing just the thread (enable in the render settings)
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