It is really a matter of quality for both of us. Our dark glass protects the olive oil from the deteriorating effect of light. When you think about it, many health products are packaged in brown bottles or expensive dark green bottles like wine. Even the classic milk bottle has been retired in favor of an opaque carton. A few weeks of light exposure will accelerate the aging of olive oil if it is not protected. It is also a good idea to store your oil in a (dark, cool) cabinet rather than on the (bright, warm) counter top, to slow its aging. Little Angel olive oil is packaged to be protected so the freshness and healthful benefits will last.