Time is running out for Sigg's bottle exchange program!

If you have a Sigg bottle manufactured prior to August 2008, the bottle includes a liner that is not BPA-free.

Sigg offered an official statement earlier this month, saying that they are offering a short-term voluntary exchange program.

Bottles containing the old BPA liner can be exchanged for the newer models, which use a powder-based, co-polyester EcoCare liner.

This exchange offer is only available until October 31, 2009.

To determine which liner you have, see photos at the Sigg website.