source Greek yogurt
The source greek yogurt is good. I can find it at almost every grocery store including freshco which seems to have the best selection.
I prefer to buy the plain greek yogurt from Costco and add my own ingredients in it. It gives you more bang for your buck. yes the source are more convenient but what I like to do with the Costco/Kirkland brand is take the whole tub and 'flavor' it with cinnamon put a banana in it and then it is ready for the day. YUM!!!