W. Va. Code § 60-8-6c
(g) Wine Growler defined. — For purposes of this section and section §60-8-6d of the code, "wine growler" means a container or jug that is made of glass, ceramic, metal, or other material approved by the commissioner, that may be no larger than 128 fluid ounces in size and is capable of being securely sealed. The growler may be used by an authorized licensee for purposes of off-premises sales only of wine for personal consumption, and not for resale. The wine served and sold in a sealed wine growler may include ice or water mixed with the wine to create a frozen alcoholic beverage. Any frozen alcoholic beverage machine used for filling wine growlers shall be sanitized daily and shall be under control and served by the licensee from the secure area. Notwithstanding any other provision of this code to the contrary, a securely sealed wine growler is not an open container under state and local law. A wine growler with a broken seal is an open container under state and local law unless it is located in an area of the motor vehicle physically separated from the passenger compartment. For purpose of this article, a secure seal means using a tamper evident seal, such as:
(m) Rules. — The commissioner, in consultation with the Bureau for Public Health, may propose legislative rules concerning sanitation for legislative approval, pursuant to §29A-3-1 et seq. of this code, to implement this section.
§60-8-8. Authorizing wineries and farm wineries to sell and serve wine at fairs and festivals.
All wineries and farm wineries also possessing a Class A wine license or private manufacturer club license may serve and sell wine as set forth in §60-4-3b and §60-8-3 of this code at any licensed fair or festival in the state of West Virginia, subject to the fair or festival licensee granting the winery or farm winery permission to do so in writing.