The humble bottle of essential oil has long been a staple in Vietnamese households. Primarily composed of natural essential oils such as peppermint, camphor, and eucalyptus, it is commonly used to alleviate headaches, colds, stomachaches, and motion sickness. However, not many are aware that even when the oil runs out, the small bottle still has numerous surprising uses, especially in deodorizing, pest control, and household cleaning.
Instead of discarding it, consider these five tips to repurpose an old essential oil bottle. Not only will you save costs, but you’ll also contribute to environmental protection and create a fresher and cleaner living space.

1. Deodorize and Pest Control for Wardrobes
Wardrobes, especially during humid seasons, are prone to musty odors. Instead of using chemical air fresheners or scented bags, place an empty essential oil bottle inside. Even though it can no longer be used for drops, the residual essential oils are sufficient to gently diffuse a pleasant fragrance, capable of:
- Absorbing musty odors from clothes and bedding.
- Repelling cockroaches, mosquitoes, ants, and other small insects.
- Maintaining a fragrant and comfortable wardrobe space.
This method is particularly effective for old wooden or plastic wardrobes, which often have unpleasant odors. Placing just 1–2 bottles of essential oil in the corners of the wardrobe can make a noticeable difference.

2. Repel Pests at the Base of Plants
For those who love gardening, old essential oil bottles can become natural “bodyguards” for your plants. Simply open the bottle and place it at the base of the plant or near the growing medium. The slowly evaporating essential oils will help:
- Repel pests such as aphids, mealybugs, and ants.
- Prevent the appearance of snails, mosquitoes, and flies.
- Create a pleasant fragrance for balconies and gardens.
This method is both economical and safe for your health, especially for families with young children or pets, as it avoids the use of chemical pesticides or insect sprays.
3. Deodorize Musty Areas and Repel Insects
Musty odors often accumulate in dark and damp areas of the house, such as under beds and cabinets, in bathrooms, and in other dark corners. To address this issue, simply place an empty essential oil bottle in these locations. The fragrant oils will quickly diffuse, helping to:
- Effectively deodorize musty areas, especially during the rainy season.
- Repel mosquitoes and flying insects from entering the house.
- Maintain a dry, clean, and pleasant living space.
Compared to air fresheners or scented wax, essential oils are a natural, safe, and non-irritating alternative.

4. Simple Shoe Deodorizer
Shoes, especially athletic shoes or leather shoes worn for extended periods, tend to develop an unpleasant odor due to accumulated sweat. A useful tip is to place an empty essential oil bottle inside the shoe overnight. By morning, you’ll notice:
- A significant reduction in shoe odor.
- A pleasant peppermint fragrance.
- A more comfortable feeling when wearing the shoes.
If the essential oil bottle is completely dry, you can soak a cotton ball in the residual oil and place it in the shoe to enhance the deodorizing effect.
5. Natural Floor and Surface Cleaner
Another clever way to reuse old essential oil bottles is to make a natural floor or surface cleaner for the kitchen and bathroom. Here’s how:
- Soak the essential oil bottle in a bowl of clean water.
- Add a few spoons of white vinegar and gently shake the mixture.
- Use this solution to mop floors, wipe dining tables, or clean sinks.
Vinegar has antibacterial properties, and when combined with peppermint oil, it creates a natural, non-toxic cleaning agent. The refreshing fragrance also helps create a relaxing and pleasant atmosphere.
A few notes when reusing old essential oil bottles: Do not reuse bottles that have been stored for too long (over 2 years) as the oil may have degraded; always keep out of reach of children if the bottle does not have a child-proof cap; avoid placing essential oil bottles near high temperatures or open flames.
Essential oils are not just a medical necessity but also a powerful ally in household cleaning and maintenance. Even when the oil is gone, these bottles still have hidden benefits in deodorizing, pest control, plant care, and creating a more pleasant living environment. Instead of discarding them, apply these simple tips to maximize the utility of old essential oil bottles. Save costs, protect the environment, and keep your home fresh and clean every day!