For the most part, we're trying to transition away from plastic food containers entirely. We've switched about 90% of our containers from plastic to glass. However, there are still some instances when plastic makes sense — so it's good to know which plastics are the safest for your food and the greenest ...
The Plastic Containers Buying Guide at National Geographic's Green Guide has all the important info you need to consider before buying any plastic that's going to come into contact with your food.
The guide tells you which plastics are the easiest to recycle and which plastics are not know to leach any chemicals into food. The guide also recommends a few good brands.
An important tip from the guide: Just because a plastic container says "microwave safe" that doesn't mean it won't leach nasty stuff into your food. Always heat food in glass or ceramic!
Image: The Green Guide