I made my first batch of soap using a CP beginner kit from Brambleberry. The Brambleberry tutorials I watched before hand showed her using glass Pyrex type containers for mixing lye, so I bought a dedicated glass Pyrex for that purpose. When I joined this forum, shortly after making my first batch, I read the introduction for new members and was surprised to see the caution about mixing lye in glass containers. I have since used plastic for lye mixing, but I'm now wondering if it really is that big of a deal? Also, does dry lye have to be measured in plastic before mixing with the liquid, or is glass okay to use?