I'm not loving this new Sigg. I've had metal ones for years and enjoyed them, but the quality of this one is not what I was expecting. The mouthpiece doesn't have a good seal, so air leaks in when you sip leading to a machine-gun-style drinking experience. If you adjust the seal you might be able to get a steady stream for a few seconds, but then it inevitably reverts back to its air-water-air ways. Also, it looks kind of funny. It's much taller and thinner in real life than it looks the picture--it's 11 inches tall and less than 3 inches in diameter. The purple color is nice, but the lid is white, not light grey as the picture suggests. I'm returning it.