Cast Iron Pan

Hi Rabbi, I purchased a pre-seasoned cast iron pan from Lodge, which says they use vegetable oil for the seasoning. Do I need to kasher or can I use as-is?

Dipping Guide

Hi Rabbi, we recently purchased some dishes (one set of bone china and another of some sort of coated ceramic) and some glass food storage containers. Are there any general guidelines to be aware of as to what requires immersion? thanks!