Lube cap
thingiverse
This is a screw-on cap for a plastic bottle (e.g [1]).) with a little air hole and a larger one to feed through a 3mm silicone hose (e.g. [2]). It can be used as a supply for liquids. For example as lube supply for certain milking machines. [1]: https://www.amazon.de/Squeeze-Kunststoff-Quetschflasche-Condiment-Flaschen/dp/B09B3B9LXK [2]: https://www.amazon.de/gp/product/B08MFRH48R
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