I am a drop of water. I am pure and clean, and I am pleasant to look at, and pleasant

I am a drop of water. I am pure and clean, and I am pleasant to look at, and pleasant to taste. I am a pleasant fluid to swallow, and a pleasant fluid to digest. I am a good fluid to wash in, and a good fluid to swim in. I am a pleasant fluid to boil vegetables in, and to make them tender and easy to digest. I am a pleasant fluid to make drinkable, and I am good for cleansing the inside