The Metal Furnace is an incinerator that made an appearance at the beginning of "Hurtful!" and can melt anything that it comes in contact with. It was used on Spongy, Firey, Flower, Bubble, Leafy, and Ice Cube to melt metal to fix the Tiny Loser Chamber.
The metal gauge on the side that gauges the amount of metal in it goes as follows:
- AUGH, SO CLOSE!
- ALMOST ENOUGH
- BARELY ANYTHING