pill. n. 1. (Pharmacology) a small spherical or ovoid mass of a medicinal substance, intended to be swallowed whole. 2. (Medicine) the pill (sometimes capital) an oral contraceptive. 3. something unpleasant that must be endured (esp in the phrase bitter pill to swallow). 4. a ball or disc. 5. a small ball of matted fibres that forms on the surface of a fabric through rubbing.
Fill your jars, while still hot place a waxed disc over the pickle, then a clear (cellophane) circle over the top of the jar, and secure with a rubber band. As anything with vinegar can get through the clear top it's best to put a metal lid as well, over the clear cover.
Pack jars tightly with mushrooms, filling to 1.5cm from the rim. Add hot marinade to 1cm from the rim. Remove bubbles, check headspace is correct, wipe rims with damp paper towel and seal. Process jars in a boiling water canner for 20 minutes. Process in a boiling water bath canner for 20 minutes (start timer once water returns to a full boil). When time is up, turn heat off and rest jars in water for 5 minutes before placing onto a towel-covered bench overnight to cool. Next day: check for seals. Check jars have sealed before labelling and storing in a cool, dry and dark place for up to 12 months. Jar lids should not flex up or down when pressed.