Review (5/5): So far I used two and it works good
Maybe too soon to do a review because I only used 2 of them but so far it's good. The dark bottle, made is good for light sensitive essential oils, plastic, so it's not have to worry about breaking, and PET, so it will still work even for weeks of being used. I am bias on my review because I purchased a couple of plastic bottles from local store and worked but after one full day, it's going to the garbage because essential oil even just a little bit mixed with distilled water will melt the plastic. For those interested, 4 oz. btl. mix 1 tsp oil and 1 tsp polysorbate 20 (1:1 ratio) shake and leave it in the bottle (I leave it overnight) then fill the rest with distilled water and shake. It will mix really well and no more oil floating on top of the bottle. Orange is my favorite but any essential oil works. A great gift.