Vintage Single Ruby Red Clear Glass Coffee Mug Arcoroc France "Cocoon" Pattern This vintage single ruby red clear glass coffee mug by Arcoroc France features a unique "Cocoon" pattern, adding a decorative touch to your morning routine. The round mug has a capacity of 8 oz. and a glossy finish, perfect for all occasions. Hand wash only to maintain its original finish and signed by the manufacturer. This collectible piece from the 1990s is a contemporary style piece that showcases the fusion of glass techniques in its production.