Wash peppers, and pack solidly into a sterilized pint-size jar. Combine vinegar and salt in a small saucepan; stir well. Bring to a boil. Remove from heat and immediately pour over peppers, leaving a 1/2-inch headspace. Cover at once with a metal lid, and screw metal band tight. Refrigerate for at least 1 hour before serving. (May be kept refrigerated up to 1 year).