Essay 1685 on 杯 (sake cup; cupful) Is Now Out!

If you invite someone out for drinks, use saké cups, make a toast, and count how many drinks you've had, 杯 will come in very handy. And if you drink till you're tipsy and full in a cheap drinking spot filled with people, you'll need 杯 four more times. As if this kanji weren't useful enough, you can also use it when counting octopi (which you might do after enough drinks)!