just wondering

Why does my evian bottle say, "Do not refill."?

What's going to happen if I refill it? Which, by the way, I've already done, with no apparent negative consequences save that evian did not make any more money from my water drinking. As far as I can tell, this new water is not reacting badly with the evian bottle. What is evian going to do about this refilling? Come and get me, evian.

I obviously have it in for corporations lately. Next semester I'm taking corporations. He he he.