4. A Hot Tub - Hot Tub Time Machine
We can't think of a better way to travel through time and space than from the warm, soothing, bubbly comfort of a Hot Tub. We're not sure just how far back this particular time machine can take you as its only real test could only reach the 1980s, but with a little effort and some help from Chevy Chase's mysterious Hot Tub repair man we're sure you could go back even further. The main downside we've found with this particular brand is that you actually find yourself getting younger the further back you go. If, for example, you are a 40 year old man and you travel to 1987 then you would emerge from the hot tub as a sprightly, mullet rocking 15 year old in your stone wash denim. If you weren't born then theoretically you wouldn't exist however Hot Tub Time Machine the movie suggests otherwise.