So glad to know that in California, Safeway takes back the silver bags. However, the Safeways I frequent don’t know anything about it. Is there a particular program I should be asking about. Also, how do I find out whether I am in an area that takes the gel packs back (don’t need more) my zip code is 95014. Last time I asked the driver, he said “no” but that was about 4 months ago right after you started taking the boxes back. Thanks !