Note: If using Stella Rosa Red or Stella Rosa Black, both of these wines have a hint of fizz, so it's best to mix this drink close to the time it will be served.
Add blackberries, strawberries (whole or cut), blackberry rum, Absinthe, and 1 bottle of red wine into a large pitcher. Taste test for flavor - given the Absinthe, you may want to add a hint of sugar (1-2 tablespoons max). Give the sangria a quick stir to mix all the ingredients. For best results, cover pitcher and let chill in the refrigerator for 1 hour.
Serve immediately with additional fruit as garnish, if desired.