Place bread cubes in a jar or resealable plastic bag. In a small plastic bag, combine the celery flakes, parsley flakes, onion, bouillon, poultry seasoning and sage. Tie the bag shut and attach to jar or bag of bread cubes. Yield: 1 batch.
To prepare stuffing: In a saucepan over medium heat, bring water, butter and contents of seasoning packet to a boil. Reduce heat; cover and simmer for 10 minutes. Remove from the heat; add bread cubes and mix gently. Cover and let stand for 5 minutes. Toss with a fork before serving.