As new information came to light this practice was abolished and only fruit ,jams, jellies,sauces,relishes.and pickled ingreients were allowed to be waterbathed.
Originally we used a Fowlers stove top waterbath, and my mum passed on her Electric preserver...this was heaven (or so it seemed at the time)
The Fowlers Vacola bottles come in many various sizes, either having a 2 ,3 or 4 inch mouth. They are varying heights and volumes, and like the older mason jars, we still find a few special blue ones around.
We have recently purchased a new Electric water bath , as we felt the thermostat on the older one may no longer be as accurate as it should be,. I still do most of my fruit ect by this tried and true method.