So, theres no open to smell the oil!
The neckless is cute but it doesn't have space for the aroma exhale. The cover is not hollow, so we have to open the pendant in order to smell something. This is not really practical, in my opinion. In addition to that, this picture is deceptive, because it shows a dark gray necklace and not a black one. There are tons of black necklaces pictures at aliexpress and none look like this one. So, I ordered a dark gray necklace, but I ended up getting a black one.