Yes, you may; however, I recommend that patients wait until the Regular Diet Stage to begin carbonated beverages. By this time, patients are more familiar with the limitations of their stomach pouch, and will better estimate how they will react to carbonated ingestion. Carbonation will not enlarge the stomach pouch, nor will it cause a gastric band to slip. It may, however, cause significant pain, gas, and bloating if taken too quickly. Just go slowly at first, and be careful!