Hot tubs are great in wintertime. All that holiday stress and running around can be melted away within about half an hour of sitting in all those comforting bubbles. But, the thing is, hot tubs are expensive -- very expensive. Newer models (which can start quite small in size) begin in the range of $2,000 and go up to $10,000. That's a lot of green to relax.
What if you could build a functional hot tub for about $75? Even though it won't win any popularity contests for good looks, this homebrew hot tub uses convection heating and a hollowed-out liquefied petroleum gas tank along with some corrugated iron to get those bubbles bubbling.
And now, the obligatory disclaimer: try this at your own risk, please. It appears that no electricity or motor is used in this hot tub, so no danger of electrical malfunction. But bare flesh and corrugated iron? Yikes -- be careful.