Building on over a decade of experience in collapsible drinkware, the Frontier Collapsible Cup has been engineered to be sleeker, more ergonomic and lighter. Glass reinforced nylon 66 is used for the base, rim and centre ring providing more stability and allowing you to grip the cup more easily. EU food grade silicone rubber sidewalls let the cup shrink down to less than 2cm in height. Designed to nest/stack, these cups really do fit in anywhere... Product Features Collapses flat to less than 2cm thick - Frontier Cups fit into your pocket (and fit your lifestyle) Made from BPA-free, food-grade silicone, with nylon rings to maintain shape and shield fingertips from heat Base, rim and centre ring made of light-yet-durable glass-reinforced nylon 66 Weighing a mere 54g, this 400ml, space-saving cup takes lightweight functionality to a new level Nests with other Frontier Dinnerware and the 2L Pouring Pot