In a large resealable plastic bag, combine the first five ingredients. Add brisket; seal bag and turn to coat. Refrigerate overnight., Transfer brisket and marinade to a 6-qt. slow cooker. Cook, covered, on low until tender, 8-10 hours. Remove meat; discard bay leaves. Reserve juices in slow cooker. When cool enough to handle, shred meat with two forks. Return to slow cooker., Using tongs, serve shredded brisket in tortillas. Add toppings as desired., Freeze option: Freeze cooled meat mixture and juices in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally. ,