KeySmart® ruostumaton teräs -vesipullo | Artix® lämpösuoja | Kylmänä 24 tuntia | Kuumana 12 tuntia

Left it in the car during a 90-degree day and the water was still icy at dinner time, which is exactly the 24-hour cold claim in action. The Artix shield makes the outside barely sweat even in humidity, so no wet cup rings on my desk. Already ordered a second one for the gym.

I'm genuinely surprised how well the double-wall insulation holds up—iced my water at 7am and it was still painfully cold at dinner. The Artix shield makes the outside stay dry, no sweating on my desk, which is a huge plus.

Left it in my car overnight in freezing temps and the water was still perfectly cold the next morning—the dual layer insulation really works. The stainless steel body feels sturdy and the finish hasn't scratched yet after a week of tossing it in my bag.