Methusalem is a term for a wine bottle size in champagne. It holds six liters, which is nearly 1.6 U.S. gallons.
The methusalem (or methusalah) bottle has the shape of a burgundy wine bottle, that is, from its cylindrical bottom it tapers gently (doesn't have "shoulders" as a bordeaux wine bottle does) to its top.
by Murrax June 02, 2007