The Water Chamber has stainless steel base, and can be reused for an extended period of time as minerals in the water will not readily corrode the base. The Water Chamber has a removable base, is dishwasher safe and holds 13.2 fluid ounces or 400ml. It is recommended to use distilled water in the reservoir tank to prevent corrosive build up of calcium and lime which can develop with the use of standard tap water. For best hygiene results and to avoid bacteria contamination the water chamber tub should be emptied daily. For disinfection purposes of cleaning uses one part vinegar with four parts water.