Is there any way to sous-vide without a machine I live in an apartment and have limited space to store kitchen gadgets. I don't really like the idea of having a machine that is dedicated to one specific task.

I particularly want to get into using sous-vide as a cooking technique, but I don't really want to buy a machine specifically for this task.

Is there any way to get a similar cooking method? I know that there probably isn't a way to get the exact temperatures like you get with a sous-vide machine, but I'm looking for some kind of alternative.
I have succeeded using this beer cooler method described by Serious Eats.