Did pretty much an entire bottle by myself on Christmas as part of my 12 Days of Beermas. The wife who was supposed to help me took like half a snifter and then poured the rest into my glass, and said she couldn't do it. I started at 1pm and didn't drink anything else the rest of the night until the bottle was done. Needless to say Xmas Day SUCKED big time with a pounding headache! It can be done, just prepare yourself Grasshopper.