Legitimate CBD products are sold in dark, opaque bottles with labels that warn the consumer to store the bottle away from light, in a cool, dark place.

"Opaque bottles help reduce exposure to light and prevent oxidation of active ingredients like vitamin C," Rohan Widdison, founder and CEO of beauty manufacturer New Laboratories, says.

Three bottles out of 100 currently are made of opaque PET, and this new plastic material will represent 100 percent of milk bottles within the next five to 10 years, according to market players. "We ...