[mollusk]

Some cycling water bottles already do that kind of thing:

> The Purist WaterGate Bottle features an amorphous silicon dioxide coating that's infused into the inner-wall of the bottle. Essentially, this forms a glass-like finish that provides a totally natural, and completely inert, solution to the problem of your drinks staining the bottle or leaving behind any residual aftertaste. This infusion also shields your fresh water from tasting like plastic on very hot days, making it akin to drinking straight from a sparkling clean glass.

It's not perfect in practice though (I find that the bottles can still absorb flavors of sports drinks, especially if you forget to wash them immediately after a ride). But they definitely don't have the plastic taste and smell of other bottles.