I complained, so should you….
It sounds like SIGG had a replacement program going but it ended in october. Their new bottles are lined with a BPA-free liner, which they spent a lot of money researching. SIGG denies any wrongdoing stating that there were never any studies that showed leeching. Although that may be true it is still dishonest and disheartening that SIGG messed with their loyal customers and cared more about their bottom line than customer concerns.
The least they could do is give replacement bottles, although at this point, they’ve lost my business for good. (Patagonia has also severed ties with SIGG)