How to Keep Wine from Going Sour, 1649

Pieter Bruegel, Summer (1637)

"How to keep wine from sowring. Tie a piece of very salt Bacon on the inside of your barrell, so as it touch not the Wine, in so doing your Wine will never sowre." 

Francisco Dickinson, A Precious Treasury of Twenty Rare Secrets (1649)

Didn't finish the bottle at dinner? Just stuff some bacon in there. Your wine will stay fresh, plus it will have a nice porcine nose.