2 vintage Anchor Hocking white Oven Proof Mugs. Anchor Hocking Company is a manufacturer of glassware. The Hocking Glass Company was founded in 1905 in Lancaster, Ohio, and named after the Hocking River. White oven proof mugs like these don't come along every day. Beautiful and in perfect condition. No chips, cracks, or staining. Mugs measure 3 1/4" high and 3 1/4" across the top. Holds 7 oz. of liquid.