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 Instantly Measuring Sugar Content of Produce Motorbike That Runs on Air Transparent Aluminum Now A Reality Laser Insect Repellent Mason Students’ Invention Instantly Blows Out Fires with Bass Edible Spoons – why isn’t this a thing yet !