Yes, they do. The silicon-sleeved bottles have a bit of stiction but that's why I bought a half-sleeved version of the bottle, because I keep losing my bottles to big potholes that I cross at speed 'cos I can, and I want some more stickitivity. that was the first thing I tested when my bottle arrived. But there is also a smooth all-stainless version if that is what you want.
Suggestion: buy the half-sleeved one I got and you can always slide the sleeve off later and use the bottle without, if you prefer it that way.
One small possible negative though. The black tube on top that swivels upright that you suck on is not covered. I imagine that on a mud pluggers' bike, or in a cage under the bottom tube near the bottom bracket it will get yucky pretty soon. For my sort of riding, and with the bottle carried a fair way off the road, it doesn't matter. I've had bottles without protective fliptops before, and the teat doesn't get dirty, again, in my sort of riding.
