If you are convinced the item is pasteurized, that as long as any SV pasteurized item
depending on how cold your refrig. is and that the item stays sealed.
Id look up tables for your 80 C and the thickest part of the pudding in the jar to determine pasteurization times
then find the coldest place in the refrig.
done
however, if they are as tasty as they look they will be long gone well before that date.
yes :
you complete the seal on the jam jars while they are still very hot, having allowed air to escape at the hot temp.
PS the vacuum in jams and jelly jars and indeed 'canned goods' at the store has nothing to do
with pasteurization. its used so that you know the jar/can has remained sealed after processing :
you near or feel the hiss of air entering the jar/can therefore its remained with a tight seal
if you don't hear or feel this as you open the jar/can you toss it out.
