Grog Tiki Mug. Glazed up in a new, rich brown color. These Doug Horne designed mugs from Tiki Farm are destined for Tiki Mug history as some of the most popular mugs ever. Grog holds 20 oz. and measures in at an impressive 8 1/2". UPDATE: Grog has been retired and is no longer being made. Once we sell out, thats it on this great mug.