The Civilized 2-Mode Nesting Cup System - Ready for camping and travel, the humangear cupCUP provides a secure, insulated, and compact nesting mess kit Smart Design - Converts from a double-wall insulated mug with sipping lid to two single-wall cups, plus it fits seamlessly into the humangear GoKit Secure Lid - Sip don't drip - press-fit sipping lid made with silicone gasket prevents leaks so you can enjoy soup without the spill Responsibly Made - Eat to your health! We use FDA food-safe material that is BPA-free, PC-free, and Phthalate-free Since 2007, humangear believes design comes from empathizing with those who seek what's reliable, multi-functional, and sustainable. We're passionate about creating evolved products to help humans and the planet, too