Sertodo 25oz Pure Copper Cup | Hand-Hammered, Heavy-Gauge Copper Cups for Water, Cocktails & Moscow Mules | 100% Solid Drinking Tumbler

This is the best copper cup I've ever purchased, the quality of the cup, is incredible, everytime you hold it in your hand it feels like no other. The only problem I have is that, it doesn't come in a larger size, I have to refill it multiple times at one setting

Lovely. Great for self or as gift. Genuine copper.

Beautiful glass. Will use for the rest of my life. Since I’m almost 70 going on 50. No sharp edges. Thick. Received at 8 pm. Cleaned out. Went to bed. 8 am oxidized at edge of water level and all around bottom. Cleaned out with salt and lime. But now what? I thought the whole point of having copper was to let it sit and drink clean copper. The internet says don’t drink out of an oxidized glass. Will make you sick. Sending it back and getting a new one. Looks like you can’t use tap water. That’s what turned my cup black. Filtered water did not.

I would like to give it 3 1/2 stars just because I ordered two different brands of copper cups and the other ones are superior in every way these are a decent thickness, solid copper. I’ve been using them for one day now and I’m noticing black spot starting to form from water being on them very quickly and it’s not easy to take off if you can imagine inside the cup without chemicals and or abrasive sponges, etc. The other brand I purchased are smaller, but they’re thicker heavier duty, and feel solid in your hand. I’ve been using them for about a month now and no black spots. Water spots come off easily with a microfiber towel and I can’t tell if any tarnishing whatsoever or water spots. I’m not sure if it’s a different grade of copper but for the price I’m not understanding why these are tarnishing so fast compared to these others which haven’t shown any signs of tarnishing. The third picture is a prince of Scott’s glass that I bought and have been using for a month straight I did not get any free products for this review. I paid for them myself. I don’t mean to compare the two brands but the other ones are superior. I’ve only wiped them with a microfiber towel. Well, the larger ones I’ve used brushes, mild soap, and I really don’t want to use a metal polish, but it seems like it’s gonna be the only way I can get these to stay consistently clean

This cup is 100% copper and is not sealed so you receive the benefits of the copper. Because it is real, I did see dark spots on the cup after use called patina. It is a natural oxidation process that doesn't harm you that cleans up with lemon and salt.

The cup is very thick. The drinking edge is quite sharp. I may have to file it down a little bit. It is sharp enough to cut your finger.

Perfect size especially for children. Health benefits are great for copper. Cleaning is easy - salt on a lemmon and rub it - one cup takes about one minute to bring back the shine. Highly recommend.

Love this!! Trying to get away from plastic while I drink my daily water! Super happy with quality! A bit pricy, but worth it!