It is a common misconception that it is hard if not impossible to fix an item that is made out of plastic if it breaks.  This makes sense at first glance.  Metal can be welded and wood can be glued or nailed back together, but plastic, especially the thinner variety, is just done.

To do a plastic weld you will need a tool, the glue gun.  The first step is to seal the crack with the glue gun.  Let this cool so that you have a thin seal over whatever pieces were broken.  Next, we will need to reinforce this repair with another piece of plastic.  This can come from a variety of places.  If you need a larger piece of plastic consider the lid of a juice bottle or cutting it out of the flat side of a milk jug.  If you are repairing a small crack or tear then the flat plastic tabs that you get off of bread products is a great tool.  Whatever piece of plastic you choose cut it to the size you need it and adhere that around the crack with more hot glue.  Magically your plastic item is functional again and you are only out a few cents for the hot glue.  I have seen this used on laundry baskets, dish drainers and a variety of other plastic products.  I hope it helps you save a trip to the store to buy something new.