It's not your daddy's Thunderbird, and I don't mean the sports car. Twist-off bottle caps are no longer the domain of the Gallo Brothers jugs, "wine product," and skid row. The change started with New Zealand and Australia vintners using screw tops for all grades of wine. Winemakers "prefer screw caps for white wines and reds meant to be drunk young," said Dave McIntyre who writes on wine for the Washington Post.