Per recommendation of Allergan, the Lap Band Manufacturer – Soda is not advisable. We have heard that some patients may drink flat soda, but we do not advise drinking it. Soda is what we call a ‘bad band food’. Not only is soda full of sugar, but drinking carbonated beverages endangers the life and function ability of your Lap Band. The carbonation causes your pouch to swell and may cause discomfort and trouble passing food. In addition, carbonation is also known as a probable cause of pouch dilation.