If you have received parcels in cardboard boxes, then trimming off the flaps or sides before placing in the waste basket or trash compactor will reduce trips taking out the garbage.I was astonished how quick and easy it is with these, they zip along *extremely* fast! This is not just another optional handy gadget, it is something almost no consumer should live without!Also ends the struggle with that stiff see through plastic display packaging (in my experience although this seems to contradict what other reviewers say).And helps the environment by allowing you to easily compact cardboard boxes for recycling or at least to take up much less space in the city dump.