I have only tried it with cold water on a beach with a temperature of 35 degrees and it kept it frozen for at least 3 hours.

It maintains the temperature of the water (hot/cold) for many hours. It has a large capacity and its price is very competitive.

Very sturdy construction and it maintains the temperature in the cold wonderfully. It stays refreshingly cool for many hours even when we travel and are at the beach where it can be exposed to the sun. I don't have an opinion on how it performs in hot temperatures as I haven't tested it, but I believe it will also maintain the temperature there. Additionally, the bottle doesn't produce any condensation due to the temperature difference and it hasn't suffered any damage from falls, just a minimal dent. It's worth its money and of course, after several days of use, there is no unpleasant odor from the mouthpiece, although it's good to wash it every now and then.

It's fantastic! The bottle doesn't sweat when you put hot drinks in it, it's made of high-quality stainless steel and it doesn't leave any odor when used for hours. It's durable and can withstand falls, although it may get scratched, but it's not a big deal. Overall, it has a very nice design. I highly recommend it.