...When I opened the packet I did wonder how one small sticky square would eliminate odours from the bin BUT it really does! I stuck the patch on which is small and discreet the bin lid and thought lets see what happens! My bin is by my Aga so has to be changed regularly anyway as the heat near a bin doesn't mix!! However these little patches work WONDERS and relaly trap smells! I 100% would recommend these and will 100% be buying more! They are small, discreet, and really work!!