Come and Check Our Branding Solutions.Very durable and well-made to withstand everyday practical use.The mug set to be 100% stainless steel in the interior to be tarnish-resistant. And the copper exterior is protected with a proprietary food grade lacquer to help it withstand tarnish, rust or stain.This thick Moscow Mule cocktail glasses will keep your drinks cold It also features a smooth rounded rim. Pls check inventory and detailed info before placing your orders.