These are three great candidates for the best have-one-bottle beer.
Nothing for the faint hearted, though: Young’s Double Chocolate Stout ($3.10 for 500 ml at 5.2%) from London, UK; Victory Storm King Imperial Stout ($2.40 for 355 ml at 9.1%) from Pennsylvania; and Anchor Liberty Ale ($3.55 for 650 ml at 6.2%) from San Francisco and all at the LCBO these days.
Each one is big in its own way – Liberty is massively hopped, Youngs has chocolate malt as well as real chocolate and the Victory is like licking the coffee grinds out of the percolator. Maybe you have to brew to like beers this big but I have so I do. Snazzy labels, too.