W. Va. Code § 60-7-8e
(g) Craft cocktail growler requirements. — A licensee licensed under this section shall prevent patrons from accessing the secure area where the filling of the craft cocktail or craft cocktail growler occurs. A licensee licensed under this section shall sanitize, fill, securely seal, and label any craft cocktail growler prior to its sale. A licensee licensed under this section may refill a craft cocktail growler subject to the requirements of this section. A licensee licensed under this section shall visually inspect any craft cocktail growler before filling or refilling it. A licensee licensed under this section may not fill or refill any craft cocktail growler that appears to be cracked, broken, unsafe, or otherwise unfit to serve as a sealed beverage container. For purposes of this article, a secure sealing means using a tamper-evident seal, such as: