A bucket in Minecraft is used to carry fluids in it.
Steps
Method 1 of 3: Get Iron Ingots

Step 1. Find iron ore
It can be found underground or in a cave and obtained with a stone pickaxe.

Step 2. Smelt the iron ore in the furnace
You will need 3 ingots.
Method 2 of 3: Crafting buckets

Step 1. Open the workbench

Step 2. Place three iron bars in the shape of a "V"
- 2 ingots in the side slots of the center row and one in the lower center slot; or
- 2 ingots in the side slots of the top row and one in the center slot of the middle row.

Step 3. Make a bucket and drag it to your inventory
Method 3 of 3: How to use the bucket

Step 1. Water
Find water (in the pond). Take the bucket in your hands. Right click on the water. The bucket will fill up.

Step 2. Lava
Find lava. Right-click on it when you have a bucket in your hands. Be careful not to fall into the lava. Do not pour lava on the tree, it will burn.

Step 3. Milk
Click on the cow with the right mouse button. Milk can be used to make a cake or drink.
Advice
- Empty buckets will remain in your inventory after using the liquid.
- Use a bucket to breathe underwater. Right click and you can breathe underwater for a while using a bucket.