In a large bowl, combine ground turkey, egg, water, onion, bell pepper, garlic, bread crumbs, salt, and pepper.
Form mixture into medium-sized meatballs and place in one layer at the bottom of a slow cooker
Combine BBQ Sauce and Coca Cola and pour over meatballs
Cook on high for 3 hours or until meatballs are cooked (you may use a meat thermometer to ensure the meatballs are done)