Cauldron can be filled with a water bucket. When filled, it can be used three times to fill three glass bottles. To make Cauldron, you just need two things Iron Ore and Iron Ingot using the furnace. Please follow the following steps to make Cauldron.
In order to make a Cauldron, the basic item you need to find is an iron ore. You will need to find and get at least seven iron ores. Equip your stone pickaxe and find some iron ore blocks.
Iron Ingot using furnace
We need to use the furnace to get iron ingot. Head towards the furnace to add coal in the lower box and iron ore blocks in the upper box of it. Add seven iron ores to get seven iron ingots. Add these iron ingots into your inventory.
Now use these iron ingots in the crafting table to craft a cauldron. Move to the crafting table just next to the furnace and open up 3*3 crafting grid. Add seven iron ingots in the same way as shown in the following image. You will get a cauldron in the right-side box of the crafting table. Add this item in your “ready to use” stock.