The difference is between "returnable" bottles vs throw-aways, mostly. The cap on the twistys is lighter material, too, and doesn't seal as well. Not a problem on American "light" beer, since it has essentially no flavor to lose, but all imported beers have standard crown caps. I don't know if it is a legal requirement or not, but long distance shipping can cause twistys to leak.

There are some domestic beers that still have standard crown caps, mostly microbrewery beers.

Eliminate the non-return bottles, and the twisty would probably dissapear, too -- too many bottles would fail to seal the second and third (or more) time.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!