As you separate your waste into trash and recycling, you’ve likely got your eyes peeled for one thing: three little arrows chasing each other in the shape of a triangle.

So, if this handy little graphic tells us what can and can’t be recycled, why is the recycling symbol potentially on its way out? And more importantly, what do designers believe should take its place?

The recycling symbol was designed in 1970 by Gary Anderson, then a student at the University of Southern California. Leading up to the inaugural Earth Day in April of that year, the Container Corporation of America sponsored a contest for people to design a symbol that would promote the recycling of paper. Anderson had previously done a class project on recycling water waste, so he already had a graphic in mind that could work.