Try the link above the poster identified a jar he found that worked here is an excerpt, it was promising enough to make me order the product today.
Well, it is March 31, 2010 and ,I have had the Easiyo for over 18 months at this point. I have used it constantly. I have learned that I need only 1 heaping tablespoon of yoghurt per quart of milk to start a new batch. I found some glass jars that work just fine and use them now instead of the plastic jars the company sells. I get the jars 2 per pack at Costco. They contain artichoke hearts, and the brand is Cynara. The plastic jars were fine, but I just have a preference for glass. I put in my 1 TBL of yoghurt, fill the jar to 1/2 inch or so from the top, put on the lid, and shake it 3 or 4 times, no more. Then I put the boiling water into the Easiyo, put the milk-filled jar inside, and screw on the Easiyo lid. 10 or 12 hours later, I put the yoghurt into the fridge for the final set, and a couple of hours later, I crack the jar and Voila! perfect yoghurt. I've made yoghurt for most of my 61 years using every method ever recorded, and this one is the best and provides the most consistent results with the least effort. A great labor saving product if you like home-made