Just to clairify, the LC lid with syringe as air filter YoshiTrainer is referring to is a lid with two SHIP holes sealed with silicon. Both holes are used with a syringe, one hole is used to inject and extract substances into/from the jar, while the other is used to allow pressure to flow and equalize. Both syringes need to be clean and the filter syringe can be done a few ways, but the most common being a syringe with the plunger removed and stuffed with polyfill.
The one thing I'd like to clarify in this discussion is that the lid flouted by Sidestreet is cheaper to make. Tyvek is free from the postal service and is otherwise cheaper than those syringe filters.