How To Expand Your Stomach Using Water
As mentioned in How To Expand Your Stomach Using Water, there are a few professional eaters that are able to drink over 2 gallons of liquid in one sitting
they do not use just water. They use low calorie sports drinks such as Gatorade or Powerade along with water to maintain their electrolytes.
if you try to drink over 1 gallon of regular water really quickly without any prior experience
You may pass out and even die.
https://www.foodchallenges.com/tips/the-extreme-dangers-of-water-training/