Steamer bags for food

I have to say that I love steamer bags to cook my veggies and fish. They always come out perfect and I don't have to use any oil to cook them, just some seasoning. I usually buy the Ziplock steamer bags http://www.ziploc.com/?p=b9 because those seem to be the only ones my grocer carries. I remember Glad offering a similar product. Anyway, the steamer bags are a great time-saver and healthy way to cook your meals.