I purchased 13 bottles of essential oils, 7 of Now brand essential oils (my go to brand) and 6 bottles of the Vitacost brand. The Now brand oils are fine because they weren't produced by Vitacost. Vitacost's bottles are totally inconsistent in volume (same size bottles); the difference in the amount of oil provided are easily noticed. Also, their bottles appear to have been sitting on the shelf for years, they're unclean and the labels on some are faded and have what seems to be glue or some other sticky substance going down the sides of a few of them. This was my first and last purchase from Vitacost, as they clearly do not have standards and do not keep quality in mind.