Well, I guess I'm the odd ball here...I've been using those exact containers for about 5 years now...no leakage, no complaints and the McClelland 5100 that is in 1 of those has aged very nicely as has AJ's #1. I've used ceramic jars also with the bail tops and silicon gaskets and the tobacco in those age just fine too. So, I'm gonna go with what I've seen work for me. By the way, take a look at the containers P&C has been selling and giving away as promotional for Rocky Patel tobacco...yup, same thing...P&C sells them for $15.00, I got them at Walmart for a whole lot less. Good luck which ever way you go.
If you have high humidity outside the jar, it will not dry out regardless of the seal.
^^^That may be the case...living in central north Florida...high humidity all year round with the exception of a few days when it gets really cold. So, that may be the reason that I haven't had any problems with the bail-top jars ceramic and plastic.