I love my copper water bottle so much! I read that around 75% of people are copper deficient and, after researching copper water bottles, I chose this one and I am so happy I did! Did! It is made in America with quality! Many other manufacturers of similar products received complaints about the lids not screwing on completely. Mine screws on perfectly and I have never had it leak. I also read that if you get one that has the hammered effect like I did, it creates a little bit more surface area for the copper , thereby increasing its effect. I have never drank as much water as I do. Now that I am using this water bottle. My body just craves it and I love it so much. Definitely a five-star product!