Place frozen berries in a large wide mouthed jar, or use a well washed plastic gallon milk carton using a funnel.
Warm vinegar and sugar and pour over 5 cups of berries in jar or carton.
Save one cup frozen berries to add to gift bottles later.
Cover container loosely and allow to stand for 8 days, shaking or stirring gently daily.
Strain vinegar and funnel into gift bottles.
For more intense color, add a few of the reserved berries to each gift bottle.
Yield: 4 quarts or 8 pints.