Made in USA from 30% Recycled PP Glow in the dark. Nite Glow activited by the exposure to light . Patented US #29,896,946 . Thumb-grip handle, with opening on bottom. New design allows beer steins to be easily stacked for better storage. 38% reduction in plastic usage compared to 14 oz. beer stein. Stackable stein allows for compact shipping and reduced shipping costs - 38% savings in shipping per minimum piece order. Durable plastic. Top shelf dishwasher safe. Hand wash only.