I replaced my very old battered Siggs with these http://www.innate-gear.com/product-info/fresco/fresco-v2

Mainly because MEC were selling the plain ones for $4 CDN (about 75c US)
They are stainless with no liner, the thread at the top is plastic so your lips don't stick to it when cold like a Sigg.
And the lip wide enough to get ice-cubes in - it's supposed to fit Nalgene bottle filters.

Downside is the wide lip spills water down your chin - like Nalgene bottles do. And the wide thread means you have to be careful not to cross thread.