Q: Can somebody use soda water for drinking as CO2-enriched water? A: A device can apply a purified medical carbon dioxide that has been used worldwide in hospitals and medical care facilities. Warm water at about 95 °F (37 °C) is used in CO2 bath therapy. Opening a bottle of soda water and warming the water allows the carbon dioxide to escape, making the water ineffective and thus useless. On the other hand, if the bottle is warmed without removing the cap, there is a danger that the rise in internal pressure could cause the bottle to burst. Under no circumstances should this be tried!