Vacuum-seal Insulation: 

Stainless Steel travel mug with vacuum-seal technology that keeps beverages hot and cold for 8 hours to preserve freshness and tasty flavor. 

Durable Double Wall Structure: Category 18/8 Stainless Steel interior and exterior, double wall structure withstand the demands of everyday use. Exterior stays condensation free. 

100% Leak-proof: High Tech cap structure to provide 100% leak proof lid to lock seal the opening. Liquid will not spill. Safe to put in purse, pocket, car, or carry for running, or in motion. 

360 Degree free flow: Special wide open cap designed to allow liquid to flow freely from 360 Degree. Easy to drink from all angles. Wide mouth opening for easy cleaning, or to add ice to keep your beverage cold. Sleek Design to maximize for 18 oz. capacity. Mug base is designed to fit most car cup holder compartment, back pack pocket or purse. BPA FREE and safe to use: All parts are made from BPA Free materials that have been certified and approved. Safe to use. Dishwasher safe. Do not microwave.