This is going to sound funny -- but I only own one wine glass! It's a cheap thing that my son gave me for Christmas one year (dollar store, I guess) and it's got snowmen and santas and holly berries on it.

I'm pretty sure it's about 5 ounces, but just out of curiosity, maybe I'll measure.
We usually split the steaks in half, too -- two strip steaks between the four of us. Yum!
Yes, that is an interesting report. As a...well, a person who enjoys knocking back a few on special occasions (like on days that end in Y) I've always been a stickler for keeping track of how much I've imbibed. That is one reason I never get mixed drinks at bars--you never know how "friendly" your bartender is feeling that night, y'know? I've had many a hangover after I thought I'd only had three drinks (and it was more like six).
I've had some pretty silly ways to do this too, like keeping beer bottlecaps or can tabs in my pocket so I can check at some point to see whether I'd be popping open a 5th or 6th.