I've got close on 150 litre of preserving jar capacity  in thick glass lidded jars called Weck preserving jars .. they seal by vacuum and a rubber seal. To do the sealing I have an " All American Pressure Canner ".
 You can , "  pressure can " almost everything you see in the shops in cans ,jars or plastic containers. . Once canned  they store in a cool room.  Mine are on shelves separated by engineering bricks at each end & at the 1/2 way point along the 8 foot 2 inch x 4 inch wide  planed smooth thick pine planks …. to make each shelf 8 inches wide & able to support 100 kg or more on each shelf in safety . 
 I was able to take advantage of a commercial glut of tom in 2016  and so canned 30 pound of tomatoes @ £1 per 6 pound tomato tray .. we finished the last one about three weeks ago. Still got tomato sauce  left though.
 I've also used the ( pressure ) canner to make gallons of various stocks and can it in pint & 1/2 pint jars . Some of which went back to 2015 when it was used  a couple of months ago .
 One thing ...delicious spiced foods lose their spiciness when pressure canned .
 
 It's not a cheap start up hobby ,  has cost us getting on for £800 but most of the jars have been used eight or more times .. the canner is included in the above price  was about £ 300 imported  from USA five or six years ago. 
 Consumables are:-  each jar has to have a new seal ring ..you can't reuse them & be safe , the canner itself has a renewable safety plug , buy two when you get the canner .
Lids & rings are clipped to the jars prior to canning to hold the lid in place  buy the jar , lid , ring & 2 clip  as a complete set up per jar it's usually cheaper this way .
 I surf the net for the rings as some places charge 19 euro P&P , others are around P&P @£ 4 for about 100 sealing rings  . 
 I decided to only use two different  diameters of jars so I'd only need two different sealing ring sizes  as sometimes they are on special offer  in my sizes .
 I have about :-
 20 x 1 litre tulip jars
 36 x 750 ml pot noodle tapered style jars as everything slides in or out of them 
54 x  half litre jars 
72  x 250 ml jars   for chutneys jams , sauces & thin sliced pickles etc. 
 My canner is five or more years old and hasn't needed a new safety plug as yet  , the unused plugs are labeled up & sealed in a vac pack heat sealed heavy duty  sealing bag . 
 If you are interested in learnig more drop me a PM & I'll find a lot if useful reading for you .
Should you want hands on under supervision FOC for a day we can  sort something out , but you'll have to find & pay for your accommodation etc locally  .
 Weck .com do a good YouTube  video . 
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