find 1 liter Sigg bottles for about $10 less, although it won't have a cute lulu symbol as the cap. I'm not a fan of metal bottles in general. Not only do they get dented but you have to hand wash them. You also have to unscrew the top and tip your head back to drink which I find awkward when I'm on the elliptical or spin bike. They are leak proof, though.
My favorite water bottles for the gym are the Camelback Better Bottle.