For Earth Month this year, upcycler and recycler TerraCycle has teamed up with Office Depot, Sanford, and Old Navy to offer recycling opportunities to spring shoppers and re-use difficult-to-recycle materials. Old Navy will be collecting used flip-flops at all locations between April 22 – May 21. The flip-flops will be recycled into rubber for playgrounds and donated to four communities around the country.