If its not open, putting it in the pantry or closet is cool and can last months,
Once opened, needs to go in the fridge.

too much effort manI boil water in a small pot 10 minutes before I make whatever needs to have BBQ sauce on it. Transfer the heated water to a bowl, put the BBQ sauce bottle inside of it and then heat it to room temperature, then return it to the fridge
Win win win