I'm looking for clarification here. I read another thread that said I shouldn't use HDPE bottles for developer. I asked why all the photo shops sell bottles for developer that are made of HDPE then. The only response I got was that sometimes the bottles are made of two different plastics and might be ok. I have a dozen of these things and need to know if they are actually safe to use. Of course the store I got them from said yes but now I read different! (This was the same store that told me no one made graded paper anymore, all I could get was multigrade!) Someone please clarify before I ruin a batch of developer.