Keeps water cold throughout the school day

I bought this for my daughter to take to high school to hold water instead of buying case after case of plastic water filled bottles. Her water stays cold the entire day and all of her friends now want one. The only reason I took one star off is due to the lid coming apart. The metal cover detached from the inside plastic lid. But, she continues to use it. The metal lid cover slips back over the plastic lid. So, my only suggestion is to fix that issue. Other than that it’s does everything it’s meant to do! She’s been using it for about two months now and in high school, so that’s why there’s a little wear on the bottom.