Sitting at the dinner table my daughter pulled a small piece of material from her mouth after taking a drink of her milk, maybe half a centimeter in size. First reaction was to smell the milk to see if it was sour. It was not so I assumed it was ice and I had the refrigerator set too cold. When pouring the next glass I noticed more chunks floating around in the milk. It was not ice or dried milk, but some kind of left over plastic chunks from the carton. There was one chunk of plastic about an inch by an inch a few very small pieces. By this time the carton was 3/4 of the way gone so not sure how many pieces we may have consumed mixed in with the morning cerial or stirred in the mashed patatos! I think I will avoid Kirkland milk from now on, too bad as it's about $1.00 cheaper at Costco than other milks at the grocery store.