Good question, I'll be replacing my Avent bottles with the BPS free ones. In fact, I put them on my registry this morning!
Ideas for the old ones...use them for science experiments by watching beans and seeds sprout in them.
Mix up your favorite herbal concoctions/salves. This morning I made a diaper rash cream in an old Carmex tub, and its perfect. Although, I don't know if storing herbs would be affected by the BPA in the bottles.
Hmm, I wonder if the company is doing anything about the old ones. Maybe they've got some sort of collection program?
Maybe they can be recycled? and then they can end up as door panels in our cars or the welcome mats in the front of our houses.
M.Ed. Mama to Chunka (1/07), Beauty (5/09) and Elizabear 3/12): Birth Doula (working toward certification) AAMI Midwifery Student, Advocating with Solace for Mothers & The Birth Survey