hey fellow vault dwellers! you gotta stay hydrated in the wasteland, and what better way than by representing you vault with this custom vault suit 20 oz stainless steel Double wall vacuum insulation tumbler. Keep your drinks hot for three hours and cold for nine hours. Premium material makes it never rust, anti-perspiration, no condensation and easy to clean. Stainless steel straw, splash proof lid, and straw cleaner included.