I have a 750ml bottle of Dolin dry vermouth I’m about to open that will take me several months to go through. I have wondered for some time if it would make a difference in extending a larger bottle of vermouth's useful life if I rebottled half of the vermouth into a smaller (ideally 375ml) bottle. I intend to keep both the original and new bottles in the refrigerator. My hope is that the rebottled vermouth would stay fresh, or fresher, in a smaller bottle with little empty space, than just sitting in the original open bottle. Would this work? if so, does anyone have recommendations on what type of bottles I should use and how far up to the top I should pour the vermouth?