I drink a lot of vodka. If I'm just drinking the usual day-to-day after dinner drinking, I can maybe make a bottle last two days. I keep it in the freezer and just pour it in a glass cold. I don't even really feel it unless I get into the second bottle in a night. Over the course of a day I could probably drink three bottles if I started early and paced myself. Probably can't drink as much whiskey, but numbers are similar. I do not like gin since the time I drank a handle of warm Beefeater in South Boston on St. Patty's Day and had to go to work the next morning after sleeping underneath a car. In college, I drank mostly beer, and the numbers of beer I drank were incalculable until my fraternity assigned a pledge to count my drinks. I think they did this to shame me but we made it a competition to see if I could beat the prior day's number. It was great fun. The number got very large. On a bet I chugged 15 beers in two minutes (these were the small Solo cups so it's like 10oz pours or whatever) and then drank 30 beers in three minutes the next day. I puked after the 30, so I don't think that counts.
The hangovers have cured me of sport drinking. Reading the story about having to go to the hospital at 40 made me dry heave a little. But I can still put some booze away if I just get into the rhythm of doing it.