The Sigg is undoubtedly a leader in the aluminum bottle world, but the 1.0L bottle does suffer from a few design flaws. As mentioned in another review, it does NOT fit in the cup holder in my car and the color on the blue maha that i received was streaky - which looked defective. On the positive side, the water tastes GREAT. However, there is a question of the leaching of aluminum into the water when using the Sigg to tote acidic drinks (juice, lemon etc.) and exposing the bottle to higher temperatures (outdoors, the car - in the sun?). I would like to see more safety testing on these aluminum/coated bottles. One alternative, the Laken brand bottle, does have test results on its website, and touts its own bottle as superior to the Sigg - with no leaching and with a mouth wide enough for ice cubes. They do warn against freezing the bottle or using it for hot liquids.