I wonder if there's a point where the leaching greatly diminishes after so long (b/c everything from the surface has leached). For instance, I'd like to know i

I wonder if there's a point where the leaching greatly diminishes after so long (b/c everything from the surface has leached). For instance, I'd like to know if my hard-plastic Camelbak water container is now basically safe considering I've had it for about 4 years and refill it about 2/3 times a day, or if it's leaching at essentially the same rate as when it was new.