Review (5/5): So far, so good.
I'm guessing that this company originally had a funnel with this kit, that you'd pour the castor oil into the mascara tube with, but, my kit came with a suction tube/eye dropper, which made the filling process, pretty easy. You just suck the castor oil up into the tube, then release the oil into the mascara tube. I chose to do this process over the kitchen sink, just in case, and it didn't take long at all, even though I was being overly cautious, not to make a mess. When the entire process was completed, I ended up with only a small amount that got on my hands. Not a big deal, at all. I have one small complaint. When you're finished using the suction tube, there's no real way to clean the tube. I chose to wrap the tube with saran/cling wrap. You could use a Ziploc bag, I'm sure, but yeah, it'd be nice if they included a sealable bag for the tube, for storage in-between use. I chose this brand for two reasons, one, the plastic mascara tube that was included, and two, honestly, I just liked the look of the amber glass bottle. I immediately curled my eyelashes, and then applied this oil to test it out. As I'm writing this, the oil is not bothering my eyes. In the future, I plan to apply it at night, before bed. I'm giving 5 stars, but, will update my review if anything changes.