Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Careful Sterilizing

I got this product and boiled it as directed to sterilize. I now have 10 bottles that are partially melted, same with the caps and the little inserts. Worst part of it is that I now have melted plastic on the bottom of my good pot! I am still using the bottles to store milk, but not really happy with the product.