I agree, its already sanitary.
I don't know how it is for fruit extracts but the hazelnut extract I used last night was very powerful. If you plan to flavor to taste, I'd recommend having someone in another room do the tasting for you. 5 seconds after opening the extract, the only thing I could smell was hazelnuts. It was really tough for me to gauge how much flavor was coming from the test sample I was drinking and how much I was smelling in the air from the extract bottle. And let me tell you, it fatigues your tastebuds fast.
Thankfully my plan all along was to have my wife approve the final amount of flavor.
It really freaked the hell out of my cats too. They started yowling at me because it was so over powering.