German Wood Beer Mug Cover for German Beer Mugs & Steins | Keeps the Insects Out! Pictured a top a 1 liter Isar dimpled glass beer mug (not included) Solid untreated natural maple wood. Features the Bavaria coat of arms and text Biergarten Deckel or Beer Garden Cover Fits mugs/glassware with an opening diameter of approx. 2-11/16 in. to just under 4 inches Made in Germany. Width: approx. 4 inches.