The Stojo Biggie cup is ultra-portable, leak-proof, collapsible, and reusable. designed by coffee lovers, it's a convenient alternative to bulky travel mugs and better for the environment than disposable cups. Suitable for every situation! take stojo to the office, airport, gym, cafe, or park. perfect for hiking, skiing, snowboarding and camping too! once you've finished your drink, just collapse, seal, stow and go! Quickly collapses and expands. Breaks down for easy cleaning.