1. Rinse each perfume bottle with water. Then put a few drops of vinegar and water in the bottle and rinse it again.

2. Dry the bottle with a hair dryer or something like that.

3. Arrange and match perfume bottles according to size or color. This type of arrangement is very decorative and can be used as a work of art, which can be very beautiful.

You can put some pretty flowers in these bottles, so that it will be more ornamental.

5. Store your homemade perfume in an old perfume bottle, or buy a large bottle of the same perfume and pour it into a smaller bottle that you've used so it's easier to use.

6. These used perfume bottles can be stashed in your car with a few screws, nuts, or bolts of the appropriate size. Of course, be sure to label the item on the outside to avoid confusion.