Separate your matzo balls from your soup. In a separate Tupperware place your matzo balls, with no liquid. Seal and place in the refrigerator for up to 5 days. Then in another airtight container add your soup with chicken, veggies, and noodles. Seal and place in the fridge for up to 5 days. If you leave the matzo balls in the soup, they just continue to soak up the liquid and you are left with everything but broth. Even if you are planning to make this the day before serving, separate them and just serve together.