The Axolotl: Pocket Furnace!

By using an axolotl in a bucket, some furnaces, magma blocks and a diamond, you can transform your adorable aquatic pet into a extremely useful item!

It can smelt 8 items at same time with only one charge from the 8 per coal recharging. If your have less than 8, smelts 1 per time.

For set the furnace on, interact with it having at least one coal or charcoal in your inventory.

By having a smeltable item in the last slot from your hotbar (0 to 8), and interacting with the charged pocket furnace, you'll gain the smelted item counterpart.