I've blogged a few times about repurposing those plastic planter pots - once you've planted your flowers in the spring I encouraged you to keep a few of those mid sized pots and recycle the use.  Tomatoes are just starting the harvest season and you can grab those plastic pots and use them as a veggie/fruit strainer while harvesting.  You can also simply leave them in the garden, harvest and rinse - place them right back for the next week's harvest as well.  A few additional uses for those plastic pots- organize cables & cords - wrap & bundle them - when cords are in use, pull the needed length through the bottom hole - you can cut the hole to size.  If you are painting a flat item like a cabinet drawer - place four pots underneath to allow you to paint the lip of the surface.  In the winter - throw one in your ice melt and it will evenly distribute while you shake.   When the season is over, you can recycle them or keep for next year.