EcoVessel MUG500CAP Mug Cap Gray Made For Drinking On The Go - Replacement Lid For 16 Oz Double Barrel Insulated Stainless Steel Beer Mug, Available In Gray Or Black. Convenient And Hassle Free Drinking Freshness Contained - Lid Ensured Cold Drinks Stay Cold And Hot Drinks Stay Hot, No More Worrying About Your Drink Going Stale