Minecraft wiki entry for Superflat_survival, associated text: Craft a bucket and cauldron, then place the cauldron and wait for it to rain. During the rain, the cauldron slowly fills up, and when the cauldron is full of water, you can collect water using the bucket. Place the water, using glass bottle from witches to collect water bottle, place 3 water bottle in a cauldron and collect it using bucket, and create an infinite water source.