5PCS Hanging Car Air Freshener, Auto Interior Decoration 8 ml Oil Diffuser Perfume Aromatherapy Pendant Empty Glass Bottle, Fragrance Ornament with Vent Clip Wooden Cap and Rope (Heart)

These are made of a solid feeling glass, all smooth finish. They have a wooden top that screws on, also comes with a plastic plug that you could insert before screwing on the top. This keeps the liquid inside from evaporating. I left that plug off and filled it with my favorite body spray liquid and hung it in my car. I could smell it when I got in the car but if you want to make the scent stronger you simply tip the bottle upside down and the liquid absorbs into the wood cap, you can see it getting wet, then tip it back over and the scent is much stronger. My only dislike I would say is that it only lasted a week and the liquid was completely evaporated. It's a cool little gift idea. Nicely made.

Love this car air freshener. Like that you can hang it to your rear view mirror. Just add some essential oils and works great. Love the heart.

EASY TO USE, EASY TO FILL UP, WORKS PERFECTLY.

I absolutely love these hanging car air fresheners. It was really easy to fill up the bottle. The bottle is transparent, which makes it easy to see how much is filled up. Adjustable sling makes it easy to hang in the car. It can also be used at home, in bedroom, bathroom or closet. Price is also reasonable.

I like the size of these diffusers, but it holds more like 5-6 ml (but I still like the size). You just need to flip it over once in a while to get oil on the string so that it diffuses the scent better.

I love these to make a non toxic car freshener. Pretty for anyone.

Easy to fill, and work great. Scents last a long time. Good value for the price

These car air fresheners arrive individually wrapped. They are easy to fill with a dropper or mini funnel. I plan on using them in my closets with lavender essential oil.