Thanks for asking!
I have great news! My copacker tested the PH (acidic lvl) level and said it meets the standard of natural preservative state. Meaning it will last 2 years without adding chemicals/additional preservatives or drowning it in vinegar!!!! yay!!!
Of course you should fridge after opening. I personally like The Last Hot Sauce cold. Kinda like a cold soft drink, it just taste better cold. :)