Whoa. I mean, WHOA. Not only are these water bottles absolutely gorgeous and stylish, but they’re AMAZING!!!!! I bought this mainly for cold drinks, and didn’t know if it was gonna meet my expectations (I mean, it says “24 hours”, so I had no reason to expect less). So I tested it out... I put ice cold water in my bottle and drank it all throughout the day, but left a little until the next morning. I wanted to take a sip exactly 24 hours after I originally filled it. So I did,... And I have no idea HOW, but the water was still ICE COLD!!!!! Best part is, being out in the humid Texas heat and leaving my bottle in the hot sun didn’t make any difference whatsoever! Like I said, the water stayed cold, and the outside of the bottle didn’t start to sweat/condensate. It was super convenient to have chilled water with me all day no matter where I went, and I love how easy it was to refill this bottle. Seriously, I’ve been bragging about my S’well to everybody I know ever since I got it LOL It’s just so groundbreaking and wonderful... It is a little pricey, but the quality is far above similar knockoff products sold at Walmart, so I would rather pay a little more for good quality and not have to keep buying the cheap versions. This bottle will last forever with proper care. Word to the wise: I like to save some money where I can, and this isn’t exactly a popular “sale” item,... But I got my bottle at Barnes & Noble, where members save 10% on every purchase (and that can still be combined with other coupons/discounts they sent out in emails). So I got this significantly cheaper than I would’ve buying it from another retailer. Would DEFINITELY recommend!