The glass on this product is very strong and durable. They are great sizes for the right portion of feed & I love the small round containers that are perfect for salad dressing or any small side item you might need. I use these for my lunch at work & I accidently dropped my lunch bag one day & thought maybe the liquid would have spilled out on these but they didn't. Completely leak proof
I think this is a very good product. I am trying to limit my use of plastic containers. I would have liked the covering to be more secure. Overall, I think this is a good product.
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