One of the things that will be shown is an apple that was sliced ,put in a canning jar a piece of metal was put in to keep the next thing from touching to apple. That was a lit Cotton ball that was covered in sulfur . Once it was put in the lid was put on . The burning cotton w/ sulfur made a vacume sealing the jar. That was 6 months ago. Apple is still as white an crunchy as the day it was put in.