Coffee grinder pour spout
thingiverse
My wife had always struggled pouring freshly ground coffee into her small container because the grinder's mouth was larger than the jar. She finally looked at me and said, "Can't you create a spout or something for this?" And so it was created. The outer diameter is 80mm, but I'm sure you could scale it to fit other grinders. However, I will warn that the walls are only 1mm thick. If you have the time to print in 0.1mm layer height, you won't need supports and will maintain a nice finish.
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