You can give him a smack from me if he thinks that you should be drinking that much for a couple of hours. You shouldn't be looking at more than 500ml between the two of you. If you're gonna get a bottle that size then please for the love of God don't drink all of it. 375ml per person is a totally ridiculous amount for someone who's just started drinking and, as I think you said in some thread, gets tipsy of a couple of shots - bearing in mind that a shot is only 25ml.