This is the amount of coffee I can drink.
Any more and I'll be too jittery to sew, crochet, knit, or read a book. Or type, for that matter.
(Actually it's a Starbucks Frappuccino Mocha -- every once in a while I buy a small bottle, drink about a fourth of it over the course of a week or so, then pitch the rest in the trash. This is what I consider exciting and daring. Also, a fairly cheap thrill.)