teapot (n): a measure of problem complexity. A problem of 1-teapot complexity means that the person solving the problem consumes one pot of freshly brewed tea while solving the problem. A problem of 2-teapot complexity takes twice as much tea to solve.
Because I'm a Yankee, I'm not going to get into femto-teapots and peta-teapots. That's just plain silly.
Any problem greater than 4-teapots is probably going to take more than one day to solve. So I declare that a 4-teapot problem takes one day to solve. If you can't drink four pots of tea per day, you're slacking off. If you drink more, you're on the wrong side of a relativistic time dilation.
Many problems are less than 1-teapot in complexity. For those cases, I declare that one teapot contains four (12oz) teamugs.
1: Any form of tea will suffice: green tea, oolong, black tea, white tea, tisanes, fruity blends, chai, etc. For best results, start with a loose tea and freshly boiled water.