Enhance Wi-Fi Signal
If your internet connection is not as fast as you would like it to be, folding a piece of aluminum foil into a parabolic dish will significantly enhance the signal strength of your router. If you are a gamer, then you know how frustrating it can be when your online matches begin to lag thanks to poor signal.
It may look a bit odd, although, the increased signal strength makes up for the strange look. You will not mind at all when your HD or even 4K videos and films stream without a hitch, and your online matches run smoothly.
Mattress Protector
Anyone that has small children knows just how horrid bedwetting can be. Even though the idea of placing foil between the mattress and the bed sheets may sound extremely strange, it will prevent the mattress from getting wet.
The layer of foil will provide waterproof protection for the mattress. If you are somewhat concerned about the sound of the foil and the texture, you could place a soft towel on top of the foil layer. While the towel may eventually get ruined, the mattress will remain protected.