Drinking water from clay bottle will boost your metabolism without dangerous chemicals like BPA which is been mostly found in plastic bottles and containers. It also helps in keeping testosterone levels balanced, as opposed to plastic, the minerals present also help to improve digestion. How to clean this bottle and tumbler? No need to clean with dishwash soap or powder, just a normal shake with little water is more than enough. For First time users: Soak the water bottle and tumbler in water for 30 min before use.