Eli5: Why do all my cups and glasses have rims on the bottom that collect water in the dishwasher?
In: Other
It helps the cup sit flat on the table, if you made a cup with a perfectly flat bottom it would be much more difficult to get the symmetry right, and with mass produced cups that would almost always result in cups that can’t sit straight on a table and would fall over easily.
Edit: I got an award lol I’m not sure what it means but thanks a lot!
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