I use essential oils both in a vaporizer and a diffuser, and eucalyptus is my favorite. The Handcraft brand has a strong scent that makes me think not only of the tree but also of the woodland that might surround it. I have found myself frequently opening the bottle and just inhaling the aroma, which feels very healing as it goes right into my sinuses. This brand smelled great when I put it in the oil holder in my vaporizer, but it didn't send out a strong scent in the steam as other brands have. It worked really well in the diffuser, however, sending soft tendrils of smoke scented with eucalyptus into the room. The bottle doesn't come with an eyedropper, but the dropper plug is high quality and works very well.