if you need/want plastic trays, go to your local fast food place (Wendy's, Burger King, any pizza joint), most have their veggies pre-cut and placed into plastic trays that are about a foot square, are made from recycled material, are sturdy, have ridges on the bottom for water draining, fit 9 or so yogurt containers or can be used for straight seeding, stack nicely for storage, are free and keep material out of the landfills. Just a thought on the tray's, there's no cutting and each tray can be labeled easily if you only have one type of plant in it.
