I always wash new jars as they always seem to have some type of weird smell to them.
Just curious, why on earth would you need to use a funnel to place the tobacco in a Mason jar? Then again, I always use wide mouth jars, simply place the tobacco in them, and if needed I use a thee bottom of a small glass to compress the tobacco in them. Even with the small mouth jars I can't for the life of me see why a funnel would be necessary, unless of course the funnel has at least a 2" wide opening.I open the jars when I'm ready to cellar, use a plastic funnel to drizzle in the tobacco, press with a wooden spoon, place lid and screw on top.