The 18oz Alta Mug from Thermos® is a 18/8 BPA-free stainless steel vacuum insulated bottle designed for active lifestyles and everyday hydration. Keeps drinks cold for up to 14 hours. Keeps drinks hot for up to 5 hours. Durable construction built for daily use. BPA-free throughout. Specifications: 18oz capacity | 18/8 BPA-free stainless steel | BPA-free | Keeps cold 14 hours | Keeps hot 5 hours Shop all Thermos® drinkware or view best sellers . Shop all Thermos® drinkware or view best sellers .