Basically, if you have a double walled glass vessel with a vacuum in between you have to leave a hole in it until the glass is cooled. Then you pump out the air and have to seal the hole to keep the vacuum from leaking out :-). That point is away from the liquid holding surface which is usually covered by plastic or steel anyway. If you rip the bottom off you might be able to get to the lead, but then you wouldn't want to use it for drinking anymore.
That Tamara woman seems to be another BPA Bimbo.