This is drinking vessel shaped like a Mark I Diver's helmet made of cast copper & brass. As an artist proof, it is unique. This AP preceded the first edition of 50 Mark I Diver's Helmet Mugs and premiered at Tiki Oasis 2017. Grider is known for making custom parts for hot rods, motorcycles, plaques for car clubs, and most recently art and accessories made out of aluminum (including Tiki themed pieces).