This improbable membrane can trap flies in a jar—and odor in a toilet Reverse filter lets bigger things through, hold back smaller things. Facebook Prev Article Next Article Inventions Checkout these cool gadgets... Related Posts No-Contact Bicycle Dynamo Lighting Super Sand Removes Carcinogens From Water in This Filter Magnetic Floating Bed These Window Curtains Use Sand How Two Ex-Amazon Engineers Invented a New Type of Customizable Force Interface 5 Inventions That Are Changing the World Right Now