I love mugs. You’ll usually find me with a mug in my hand or at the ready, full of coffee or tea. There’s something comforting about them. I also love mugs because of what they represent; they are craft objects, honed to a traditional shape over the centuries. Mugs feel good and work well because over the years, all the stuff that doesn’t has been jettisoned in ceramic Darwinism.
Now, I like good mugs, and I also like to make fun of bad mugs. I’m sure you’ve had the experience of drinking from a stupid mug; glass mugs with metal handles (a part of ‘mugs with unusable handles’, mugs with no handles at all, and my least favorite, the giant mug with a teeny handle a huge aperture, resembling a soup bowl. Most mugs have the same aperture, and there’s a reason; it needs to be big enough to let our big homo sapiens schnoz into it, and no bigger. Anything larger than that invites the precious liquid inside to cool too quickly. If it’s smaller than that, it bumps into your nose. I have summarized my argument for proper mug aperture into the diagram below, complete with coffee swilling Frenchmen:

Handles have their own set of considerations besides not being made of conductive material. How easily do they let you pick up the mug? Can you even pick up the mug (stupid giant latte mug, I’m looking at you)? Is it a balancing operation where you are in danger of spilling? There are some cups that are made difficult to pick up or require extra concentration to properly wield. Sometimes this is on purpose, but sometimes this is because the designer was trying to be fancy and forgot about the main point of the object being designed.
This smacks of “break conventions because they are conventions,” a position that doesn’t get a lot of sympathy for me. When I was teaching music theory, we’d go through the conventions of 18th century voice leading (think Bach, then Bach again). No parallel fifths, resolve your leading tones, contrary motion. I explained that these conventions were pretty much made by looking at what Bach and friends did; following conventions sounds good, and breaking the conventions generally sounds bad. The clever students broke the rules, and guess what? Their progressions sounded bad.*
By way of conclusion, a) it’s not enough to be clever, you’ve got to be clever at the right time. Part of cleverness is figuring out what should be changed, and what shouldn’t; b), taking a moment to look into why things are the way there are adds appreciation to the simplest things, and informs cleverness (see item b); c)I like mugs enough to write a post about them.
*If there’s anything worse than a grumpy theory teacher, it’s a grumpy and angry theory teacher who just spilled scalding hot coffee on himself because he was using a stupid mug. It’s a bad idea!