Pour the vanilla extract into melted unscented paraffin wax. Your best bet is to buy a mold online to pour the hot wax in.
You could use it to make your own potpourri: https://snappyliving.com/instant-homemade-simmering-potpourri-recipes/
2 tablespoons vodka or isopropyl/rubbing alcohol 2ozs real vanilla extract the rest distilled water(you can use filtered or tap)should be about 3/4 cup
Combine in an 8oz spray bottle, shake well, and spray as needed. ANOTHER Put two caps full of vanilla extract (you can use other oils, such as lemon and lavender) in a coffee cup (or oven proof dish), then place it in the oven at 300 degrees for one hour. The smell will start to spread after around twenty minutes and encompass the whole house after the hour duration.
Should last for at least a day. ANOTHER Place 1 to 2 teaspoons pure vanilla essential oil or pure vanilla extract in small cups or bowls around the home.
I pour the pure extract in bottle with small size opening, soak the reeds in the extract then place them in bottle opening for homemade diffuser