Helps Temporarily Relieve Cough & Congestion. Automatic Shut Off. Medicine Chamber for Inhalants. Large Night Light. Easy to Fill. Up to 14 Hours of Operation Per Filling. 1.0 Gallon Capacity. Steam Vents Regulate vapor flow to prevent over boiling and spitting. Large Night Light For night-time visibility. Built-In Medicine Chamber For use with Walgreens®.