In the South, many people make their brisket using Coca Cola. The Phosphoric acid in Coke acts as a meat softener. (It also does a number of your teeth and stomach but that's besides the point! And my brother is diabetic today probably due to all the Coke he drank.)
Easy peasy recipe.
Rinse brisket and place in crock pot.
Cover with Zevia cola.
Add onion, garlic, and tomato paste
Cover and cook on medium for at least 4-6 hours. Slice.
I've cooked this overnight on low and the brisket falls apart with a fork.