Look into sterilization, you might have to get something for under the lid like go between. But lemon curd, jams, marmalades and pickles can all have a pretty long shelf life if the jar is sterilized properly

Or the one from Sydney that charges you 20 dollars on top of the normal fare just because. I’m on the outskirts of Sydney and I’ve given up on the train system, they’re either delayed, cancelled or running whenever they feel like it unscheduled now