Dishwasher Detergent

So, yesterday when I (finally!) went grocery shopping, I had to choose between the sulfite-inclusive paper container brand and the eco-friendly brand in a plastic bottle (yes, that is something of an oxymoron). I went with the low-sulfur kind in the plastic bottle because I figure I can recycle the bottle but I can't get the sulfur out of the lakes and streams. What would you have done? Do you have a great "make-it-yourself" dishwasher detergent recipe for me?