How to make potions in a cauldron in minecraft

Minecraft Java, How to put the potions in a cauldron Minecraft Java, like putting in the lava cauldron to the head in Dungeons Minecraft, see MCD: Calderone corrupt. A cauldron is a block that can hold water, lava and powder snow. A Bedrock Edition, can also keep the potions and colored water. It's also a working website blocking used by leather ................
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