If you mean 200f, yes. The traditional way is to sterilize them with near/boiling water in situ, to preserve foods without trapping pathologens. https://en.wik

If you mean 200f, yes. The traditional way is to sterilize them with near/boiling water in situ, to preserve foods without trapping pathologens. https://en.wikipedia.org/wiki/Mason_jar https://en.wikipedia.org/wiki/Mason_jar