The Retro Field & Stream Green Enamelware Large 20oz Mug is a durable and lightweight camping coffee mug perfect for outdoor adventures. Made of enamelware tin metal with a green surface coating, this round mug features a flat-bottomed design with handles for easy carrying. Compatible with all stove types, including camping BBQ and pocket stoves, this vintage-inspired mug is reusable and made in the United States by DesignPac. Shipped Free With USPS Ground Advantage. INV 5