What could be worse at a holiday party than running out of booze? Want to impress your guests and ensure a first-rate get-together? Crack open a big bottle of wine. No matter the size of the occasion, wine is always appropriate and large-format bottles (1.5 liters and above) offer up at least twice as much vino as a standard bottle and they're a hell of a lot more fun to pour. The best part? There are a slew of ready-to-drink magnums on the market that are pretty affordable. So you can live large without breaking a Benjamin.